Burj Khalifa in Dubai is not only the world's tallest building but the world's tallest building by some 1,000 feet. At 2,717 feet (828 metres) tall, it is the height of the previous highest skyscraper, Taipei 101 in Taiwan, with the Eiffel Tower perched on top
Taipei 101 was the tallest skyscraper in the world when it was completed in 2004. It stands 509 metres (1,671 feet) high and, as its name suggests, has 101 floors
The Shanghai World Financial Centre (left) and the Jin Mao Tower (right) are currently the world's third and ninth tallest buildings repectively. The former is 492 metres (1,614 feet) high and has 101 storeys. It houses the world's highest hotel rooms
The International Commerce Centre, or ICC Tower, in Hong Kong, has 118 floors and stands 484 metres (1,590 feet) high, making it the world's fourth tallest building
The Petronas Towers in Kuala Lumpur, Malaysia, are both 452 metres (1,483 feet) high and have 88 storeys, making them the world's fifth tallest skyscrapers
Nanjing Greenland Financial Centre (also known as the Zifeng tower) in Nanjing, China, is 450 metres (1,476 feet) high and has 89 storeys
The CN Tower in Toronto is the tallest free-standing structure in the western hemisphere at 553 metres (1,815 feet)
Abraj Al Bait Towers in Mecca holds the records for the world's tallest clock tower and the world's tallest hotel, as well as the world's biggest clock face. When finished, it will be the second tallest building in the world, standing 601 metres (1,972 feet) high
The tallest free-standing structure in Britain is the Emley Moor transmitter near Huddersfield, West Yorkshire. It stands 330.4 metres (1,084 feet) high...
The Great Pyramid of Giza was the tallest man-made structure in the world for nearly 4,000 years...
...before being overtaken in the eary 14th century by Lincoln Cathedral, which is thought to have stood at 525 feet (160 m) high until 1548, thanks to the addition of a spire
Burj Khalifa in Dubai is not only the world's tallest building but the world's tallest building by some 1,000 feet. At 2,717 feet (828 metres) tall, it is the height of the previous highest skyscraper, Taipei 101 in Taiwan, with the Eiffel Tower perched on top
