3rd September: Skyscraper Day

Skyscraper day: The 10 tallest buildings in the world, with an interesting fact about each one.

1. Burj Khalifa Where: Dubai, United Arab Emirates Height: 2.722 ft (829.8 m) Floors: 163 Opened: 2010. Fact: Home to the highest New Year's Firework display in the world.
2. Shanghai Tower Where: Shanghai, China. Height: 2.073 ft (632 m) Floors: 121 Topped out: 2014 Fact: Contains the world's tallest hotel and the world's fastest Lift system.
3. Makkah Royal Clock Tower Hotel Where: Mecca, Saudi Arabia. Height: 1.971 ft (601 m) Floors: 120 Opened: 2012 Fact: Incorporates the world's tallest clock tower and the world's largest clock face. The clock is equipped with flashing lights to signal Muslim prayer times to the pilgrims in Mecca.
4. One World Trade Center Where: New York City, USA Height: 1.776 ft (541.3 m) Floors: 104 Open: 2014. Fact: Built on the site of the previous World Trade Center which was destroyed on 9/11; sometimes unofficially referred to as the Freedom Tower.
5. Taipei 101 Where: Taipei, Taiwan Height: 1.670 ft (509 m) Floors: 101. Opened: 2004. Fact: It stands next to a circular park, which is the largest sundial in the world as the shadow of the tower can be used to tell the time.
6. Shanghai World Financial Center Where: Shanghai, China. Height: 1.614 ft (492 m) Floors: 101 Opened: 2008. Fact: It has been nicknamed "the bottle opener".
7. International Commerce Centre Where: Hong Kong Height 1.588 ft (484 m) Floors: 118 Opened: 2010. Fact: Home to the world's highest swimming pool.
8. Petronas Towers 1 & 2 Where: Kuala Lumpur, Malaysia Height: 1.483 ft (452 m) Floors 88 Opened: 1999. Fact: The tallest twin tower structure in the world, and also the building with the deepest foundations.
9. Zifeng Tower Where: Nanjing, China Height: 1.476 ft (450 m) Floors: 89. Opened: 2010. Fact: Its stepped shape is functional, separating the office space from the hotels, restaurants and observatory.
10. Willis Tower (Sears Tower) Where: Chicago, United States Height 1.450 ft (442 m) Floors: 108. Opened: 1973. Fact: In 2009, the building's owners considered painting it silver at a cost of $50 million, but dropped the idea.