Petronas Twin Towers, Kuala Lumpur

The Petronas Twin Towers remain the tallest twin towers in the world, a title they have held for over 25 years since their 1998 completion. Rising 452 meters each, Cesar Pelli's design was erected in just six years, a pace that outperforms #10 Notre-Dame Cathedral's centuries-long construction by a factor of over 40. The sky bridge on the 41st and 42nd floors is a structural marvel, and the towers attract 1 million visitors annually, making them Malaysia's most-visited landmark. Their height once claimed the world's tallest building crown, but they now stand 30 meters taller than the runner-up twin tower complex globally, a testament to their enduring design.