world tallest building

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World's Tallest Building: Burj Khalifa Facts, Contenders & How to Visit (2025 Update)

Discover what is the tallest building in the world: Burj Khalifa at 828m. Learn CTBUH standards, future contenders like Jeddah Tower, practical visit tips, and why height measurement controversies matter. Updated for 2024 with key stats and FAQs.