1. Burj Khalifa, Dubai
The Burj Khalifa is the tallest structure in the world at 829.8 m (2,722 ft).
Construction of the skyscraper began in 2004 and it was officially opened in 2010.
2. Casa Milà, Barcelona
Casa Milà also known as La Pedrera, one of the works of Spanish architect Antoni Gaudí was built from 1906 to 1912.
3. CN Tower, Canada
The CN Tower is one of the tallest free-standing structures in the world at 1,815.4 ft. Construction of the Tower began in 1973 and it was completed in 1976.
4. Colosseum, Rome
The Colosseum, an iconic symbol of Imperial Rome is the largest amphitheater ever built. Construction was between AD 72 and AD 80.
5. Dome of the Rock, Jerusalem
The Dome of the Rock, one of the oldest works of Islamic architecture was constructed between 688 and 691 CE.
6. Eiffel Tower, Paris
The Eiffel Tower constructed in 1889 is 324 meters (1,063 ft) tall and is one of the tallest man-made structures in the world.
7. Gherkin, London
The Gherkin, an iconic symbol of London is 180 meters tall. The building also known as 30 St Mary Axe is a commercial skyscraper and was opened in 2004.
8. La Sagrada Familia, Barcelona
The giant Basilica, one of the famous works of Spanish architect Antoni Gaudí has been under construction since 1892 and it’s not yet completed.
9. Sydney Opera House, Australia
The Sydney Opera House, opened in 1973 is recognised as one of the 20th century’s most unique buildings.
10. Saint Basil’s Cathedral, Moscow
The Cathedral, a world-famous landmark is shaped as a flame of a bonfire rising into the sky. It was built from 1555 to 1560 and commissioned by Ivan the Terrible.
11. Taj Mahal, India
The Taj Mahal, India’s most famous architectural wonder was commissioned by Shah Jahan in 1631 to house the tomb of his wife Mumtaz Mahal. The white marble mausoleum is a monument of a love story.
12. The Shard, London
The Shard London, designed as a spire-like sculpture emerging from the River Thames is one of the tallest buildings in the world, standing at 309.6 meters (1,016 ft) high.