burj-khalifa

At 828 metres, Dubai's Burj Khalifa has held the title of world's tallest building since 2010 — and as of 2026 nothing completed has come close. The runner-up, Kuala Lumpur's Merdeka 118, tops out at 678.9 metres, nearly 150 metres shorter. But the real story is the building rising in Jeddah: a tower designed to break one kilometre, a height engineers once argued was physically impractical. How tall can we actually build, and what stops us?

The Burj Khalifa in Dubai stands 828 meters tall — for context, you could stack almost two Empire State Buildings on top of each other and still not reach its antenna. But height is only one dimension of 'largest.' The world's longest bridge stretches 164.8 km across China. The Great Wall of China, including all branches, runs over 21,000 km. The largest building by floor area is a Boeing factory in Washington State that covers 398,000 square meters under a single roof. What engineering limits the next record depends on which dimension you're measuring and why physics makes every additional meter harder than the last.