A Brief History of the World's Tallest Buildings
Dubai may be struggling financially, but money problems won't keep it from opening Burj Dubai on Jan. 4 and snagging the title for world's tallest building from Toronto, which has the soon-to-be second tallest CN Tower. Burj Dubai's actual height is a closely guarded secret, although developers admit that it will be at least 2,600 ft. (790 m) tall almost twice the height of Chicago's Willis Tower. The tower, which cost an estimated $1.5 billion to construct, boasts 164 floors, nearly 1,100 one- to three-bedroom apartments and elevators that travel up to 25 m.p.h. (40 km/h) Visitors to the 124th-floor observation deck can see 50 miles (80 km) on a clear day.