The Burj Khalifa in Dubai, United Arab Emirates, has held the title of world's tallest building since its completion in 2010.
The Y-shaped floor plan maximizes views and structural stability. A "buttressed core" system—central hexagonal core buttressed by three wings—resists wind forces. The cladding system withstands Dubai's extreme heat (50°C+). 57 elevators and 8 escalators serve the tower, including double-deck units reaching 10 m/s (33 ft/s).
Jeddah Tower (formerly Kingdom Tower) in Saudi Arabia targets 1,000+ meters but faces delays. Merdeka 118 in Kuala Lumpur (678.9 m, 2023) is currently second-tallest. Shanghai Tower (632 m) ranks third.