From a small collection of buildings scattered along a creek between arid sands and the Arabian Gulf, Dubai is today the bustling centre of excellence, boasting world-class business and leisure facilities.

Dubai is a city of contrasts where outstanding modern architecture and soaring skyscrapers are juxtaposed with suburban villas and some of the traditional Arabic homes. The once open areas of the desert are now lush green parks and public garden and four world-class golfing greens.

Dubai is one of the most successful business hubs in the region offering top-notch facilities such as banking, telecommunications, state-of-the-art container terminals, airport, seaports, free trade zones etc.

For leisure, one is spoilt for choice between golfing, scuba diving, desert safaris and horse racing or bargain shopping, nightlife and getting a taste of international cuisine.

Dubai's many and varied attractions provide visitors with an opportunity to experience something 'different' as the traditions of Arabia are never far away from the modern day Dubai. This fascinating blend of modern and ancient is a key factor in Dubai's development as a tourism destination.
The Colosseum is probably the most famous landmark in Rome. Built in the 1st century AD, this great arena could seat 45,000 spectators and was the largest Roman amphitheater in the world.

It hosted gladiatorial combats, spectacles with wild beasts and possibly the execution of early Christians. Throughout the Middle Ages, the Colosseum was believed to be a place of martyrdom and was therefore regarded as a sacred place.

History
Construction on the Colosseum began under Emperor Vespasian (69-79) and was completed under his son Titus (79-81) in 80 AD. It was built on the site of an artificial lake created by Nero in this valley between Rome's many hills, in front of his Domus Aurea palace.

The arena was then known as the Flavian Amphitheatre, after the family name of the emperors who built it. The name "Colosseum" was not used until 7th century, and derives from the colossal statue of Nero that once stood here. After Nero's death, the statue was transformed into a representation of Helios, the sun god. It remained standing until the Middle Ages, when it was probably melted down for its bronze.

The amphitheatre was used for gladiatorial combats, mock sea battles, animal hunts, executions, re-enactments of famous battles, and dramas based on Classical mythology. The inaugural festival of the Flavian Amphitheatre, which was the largest amphitheatre in the world, lasted 100 days, during which over 5,000 wild beasts were killed in the arena.

The arena was restored in about 230 AD by Emperor Alexander Severus (222-35). The statistics of those who met their deaths at the Colosseum during another festival, held in 240 AD, are staggering: 2,000 gladiators; 70 lions; 40 wild horses; 30 elephants; 30 leopards; 20 wild asses; 19 giraffes; 10 elks; 10 hyenas; 10 tigers; 1 hippopotamus; and 1 rhinoceros.

The Flavian Amphitheatre was damaged by fire and earthquake several times but was continually restored until the end of the 5th century. Gladiatorial combats were outlawed by the Christian emperor Honorius in 407 and fights with wild beasts were banned in 523. After this, the arena went out of use.

According to the bishop and church historian Theodoret, Honorius was moved to ban the bloody spectacle of the gladiators because of a simple monk named Telmachus:
A certain man of the name of Telemahus had embraced the ascetic life. When the abominable spectacle was being exhibited, he went himself into the stadium, and, stepping down into the arena, endeavored to stop the men who were wielding their weapons against one another.
The spectators of the slaughter were indignant, and inspired by the mad fury of the demon who delights in those bloody deeds, stoned the peacemaker to death.
When the admirable emperor was informed of this he numbered Telemachus in the army of victorious martyrs, and put an end to that impious spectacle. (Theodoret, Ecclesiastical History 5.26)

Telemachus is the only Colosseum martyr of whom there is any evidence. The long-held belief that scores of Christians met their deaths here in the 1st to 3rd centuries has no evidence to support it and may only be a legend.
However, it is perfectly possible there were martyrdoms here, since Christians are known to have been executed in other Roman amphitheatres, such as the one at Lyon and in the Circus of Nero on Vatican Hill (see St. Peter's Basilica).

The belief that Christians were martyred here was a fairly early one, as reflected by the response of Pope Gregory the Great (590-604) to the Byzantine emperor's request for some Roman relics: among the relics given was a bag of sand from the Colosseum floor.
The Colosseum fell into disrepair shortly after its closure in 523. In 526, the barbarian Totila and his forces destroyed parts of it in order to take the valuable bronze clamps that held the stones together. After that, Romans freely helped themselves to the great arena's stones in order to build their houses.

In this period the Colosseum was also used as a Christian burial ground. Early Christian tombs have been found in three areas around the amphitheatre: in the foundations on the north and east sides and on the exterior ground near the present entrance.
In the Middle Ages, the Colosseum was situated on the most important pilgrim route in Rome, which led from St. Peter's to the Lateran, and a small suburb grew up around it. In this period the great arena was thought to be a Roman temple to the Sun because of the Colossus statue of Nero-turned-Helios that stood next to it.

In the 13th century, the Colosseum was fortified and occupied by the Frangipani family and the suburb around it became a prosperous area of Rome. However, the area later fell prey to malaria and was abandoned.
Looting of the stone continued on-and-off until the 18th century, when Pope Benedict XIV (1740-58) declared the Colosseum sanctified by the blood of early Christian martyrs and added Stations of the Cross to the arena. After this it was restored and excavated, a work that continues to the present day.

Romantic travelers of the 18th and 19th centuries were smitten with the great ruin of the Colosseum. Among these were Charles Dickens, who wrote in 1846:
It is the most impressive, the most stately, the most solemn, grand, majestic, mournful sight, conceivable. Never in its bloodiest prime can the sight of the gigantic Colosseum, full and running over with the lustiest life, have moved one heart, as it must move all who look upon it now, a ruin. God be thanked: a ruin!

What to See
The exterior of the Roman Colosseum is made entirely of travertine, stretching 527 m around and four stories high. The arches of the second and third stories were originally filled with statues. There were 80 entrances, with the two principal ones reserved for the emperor and his entourage.
The interior is made of brick, tufa and marble; little of the marble survives today. The central area, the arena, was covered with a great wooden floor and canvas to make it waterproof. Over this was a layer of sand to absorb blood - in fact "arena" derives from the Latin word for sand. The floor is now exposed down to its underground passages, where beasts and gladiators awaited their fate, and crossed by a modern walkway.

The arena was surrounded by a 5m-high wall to protect spectators from attacks by wild beasts. At the top of the wall was the podium, on which the imperial party and other VIPs had their seats.
Near the site of the imperial box is a cross, which replaces an earlier one set up to commemorate the Christians who were believed to have been martyred here.

Above this was the cavea, or seating area. This was divided into three tiers: the lowest for knights; the middle for wealthy citizens; and the top for the general population. In total the Colosseum could hold up to 45,000 spectators.
The base of the Colossus statue of Nero, after which the amphitheatre is named, can be seen between the Colosseum and the nearby Temple of Venus and Roma.
Festivals and Events

The Pope leads a torchlit "Way of the Cross" procession to the Colosseum each Good Friday.

The following is a list of basilicas (generally speaking a basilica is a large Church of special importance - prior to Christianity they were usually Roman civic buildings) recognized by the Roman Catholic Church that I found to be the most architecturally appealing.
Exterior design was predominately considered and the list was made by only scanning available pictures so I apologize if I missed some you thought should be worthy. Surroundings, interior design and historical significance had somewhat of an influence on the rankings, but again, exterior design was the main attribute considered.
10. Basilica of the Shrine of the Assumption
Baltimore, USA

Full title: Basilica of the National Shrine of the Assumption of the Blessed Virgin Mary. The Basilica of the National Shrine of the Assumption of the Blessed Virgin Mary, or more simply, the Baltimore Basilica, was the first major Roman Catholic cathedral built in the United States. It was designed by Benjamin Henry Latrobe, who also was enlisted by Thomas Jefferson to design the Capitol Building. Construction began in 1806 and was completed in a relatively short period of 15 years in 1821. The Cathedral is a monumental neoclassical-style building designed in conformity to a Latin cross basilica plan — a departure on Latrobe’s part from previous American church architecture, but in keeping with longstanding European traditions of cathedral design. The plan unites two distinct elements: a longitudinal axis and a domed space.
9. Basilica of Our Lady of the Pillar
Zaragoza, Spain

The Basilica of Our Lady of the Pillar is a minor basilica built in the 1st or 2nd century AD and sits on the banks of the Ebro. It is dedicated to Our Lady of the Pillar, the patron saint of Spain, who is said to have appeared to St. James in the 40 AD and gave him a small wooden statue and a column of jasper and instructed him to build a church in her honor. The statue atop the pillar is present in the church to this day. Amazingly, during the Spanish Civil War, three bombs were dropped on the church, none of which exploded. The architecture is of baroque style, and the present building was predominantly built between 1681 and 1872.
8. Notre Dame de Paris
Paris, France

Notre Dame de Paris is the Cathedral of the Archdiocese of Paris and is widely considered one of the finest examples of French Gothic architecture in the world. It was one of the first constructed Gothic cathedrals and one of the first buildings to use flying buttresses for support. Construction began in 1160 on the Île de la Cité and was completed around 1345. The design also famously includes numerous gargoyles and grotesques incorporated into the rainwater gutter system as well as for ornamental purposes. The basilica was a target of vandalism throughout history, most recently during the Second World War and a restoration project is currently underway to restore the church to its highest degree of magnificence.
7.St. Patrick’s Cathedral
Melbourne, Australia

St. Patrick’s Cathedral of Melbourne is internationally known as a leading example of the Gothic Revival style of architecture and it the cathedral church of the Archdiocese of Melbourne. Construction began in 1858 and, due to long and frequent economic delays, was not officially completed until 1939. The church is the tallest in Australia and was dedicated to St. Patrick as the Catholic community in Melbourne was almost entirely Irish when construction began.
6.St. Mark’s Basilica
Venice, Italy

St. Mark’s Basilica is Venice’s most famous church and one of the best known examples of Byzantine architecture. Churches on the site date back to 828 but construction of the current building did not start until 1063 and was not consecrated until 1094, with constant additions throughout its history with an official completion date of 1617. It was presented as a status symbol of Venetian wealth and power and from the 11th century onwards, the building was known by the nickname Chiesa d’Oro (Church of gold).
5. Basilica of Our Lady of Dolours
Thrissur, India

The stunningly white Basilica of Our Lady of Delours is located in southern India and is the biggest in tallest church in Asia. The church began construction in 1929 and was consecrated in 1940, yet the tallest of the towers was not completed until 2007 and was dubbed the Bible Tower. The basilica was built in an Indo-Gothic style with three large towers, the tallest of which is 260 feet high. The red cross atop the Bible Tower is lit at night and can be seen from miles away. The church is dedicated to Our Lady of the Dolours in reference to the Blessed Virgin Mary and the seven sorrows of her life.
4. Notre-Dame de la Garde
Marseille, France

Notre-Dame de la Garde is a basilica located in Marseille, France. This ornate Neo-Byzantine church is situated at the highest natural point in Marseille, a 162 m (532 ft) limestone outcrop on the south side of the Old Port. As well as being a major local landmark, it is the site of a popular annual pilgrimage every Assumption Day (August 15). Local inhabitants commonly refer to it as la bonne mère (”the good mother”). The church was built between 1853, when the foundation stone was laid on September 11, and 1864. The church was built on the site of a 13th century chapel, also dedicated to Our Lady of the Watch, the traditional guardian of seafarers.
The basilica is surmounted by a 60 m (197 ft) belfry topped with a huge statue of the Virgin and Child, visible across much of the city and for miles out at sea. Construction of the basilica took five years and required 170,000 tons of material, including 23 shiploads of marble and porphyry from Italy.
3. Basilica of Our Lady of Lichen
Lichen Stary, Poland

The Basilica of Our Lady of Lichen is located in the village of Lichen Stary near Konin in Poland. It was designed by Barbara Bielecka and built between 1994 and 2004. The construction founded entirely from pilgrims’ donations. With the central nave 98 meters tall, 120 meters long and 77 meters wide, and with a tower 141.5 metres tall, it is Poland’s largest church and on of the largest churches in the world. The church is dedicated to Our Lady of Sorrows whose icon, dating back to the 18th century, is displayed in the basilica’s main altar. It is one of Poland’s principal pilgrimage sites.
2. Las Lajas Cathedral
Ipiales, Colombia

Las Lajas Cathedral is a cathedral located in the municipality of Ipiales and built inside the canyon of the Guaitara River. The architecture of this cathedral is of gothic revival architecture built from January 1, 1916 to August 20, 1949, with donations from local churchgoers with the intention to replace an old 19th century chapel. The story of the cathedral’s creation is that in 1754 an Amerindian named “Maria Mueces” and deaf-mute daughter “Rosa” were caught up by a very strong storm. They found refuge between the gigantic Lajas and to Maria Mueces surprise the girl exclaimed “the mestiza is calling me…” and pointing to the lightning illuminated painting over the laja.
1. St. Peter’s Basilica
Vatican City

The Basilica of Saint Peter, officially known in Italian as the Basilica di San Pietro in Vaticano is located within the Vatican City. St. Peter’s has the largest interior of any Christian church in the world, holding 60,000 people. It is regarded as one of the holiest Christian sites and has been described as “holding a unique position in the Christian world” and as “the greatest of all churches of Christendom”. In Catholic tradition, it is the burial site of its namesake Saint Peter, who was one of the twelve apostles of Jesus and, according to tradition, first Bishop of Rome and therefore first in the line of the papal succession. Tradition holds that Saint Peter’s tomb is below the altar of the basilica. There has been a church on this site since the 4th century. Construction on the present basilica, over the old Constantinian basilica, began on April 18, 1506 and was completed on November 18, 1626. It is associated with the papacy, with the Counter-reformation and with numerous artists, most significantly Michelangelo. As a work of architecture, it is regarded as the greatest building of its age.
Bonus. Sagrada Família
Barcelona, Spain

The Temple Expiatori de la Sagrada Família, often simply called the Sagrada Família, is a massive, privately-funded Roman Catholic church that has been under construction in Barcelona, Catalonia, Spain since 1882 and is expected to continue until at least 2026. Considered the master-work of renowned Catalan architect Antoni Gaudí (1852–1926), the project’s vast scale and idiosyncratic design have made it one of Barcelona’s (and Spain’s) top tourist attractions for many years. A portion of the building’s interior is scheduled to open for public worship and tours by September of 2010. The construction budget for 2009 alone is € 18 million. Since it is not yet open, it is not officially recognized by the Vatican as a basilica, but it this should change as the church nears completion.