Petronas Towers - Kuala Lumpur, Malaysia - Height: 452 meters - Completion Year: 1998 - Construction Cost: Approximately $1.6 billion

Detail: The Petronas Towers held the title of the world's tallest twin towers until 2004 and feature a unique double-decker skybridge.

Interesting Fact: Their design is inspired by Islamic motifs and represents Malaysia's rise in the modern world.