Which country in the world has the tallest building?

The Burj Khalifa in Dubai, UAE, stands as the world’s tallest building at 828 meters, completed in 2010. Inspired by the Hymenocallis flower, it boasts luxury residences, offices, the Armani Hotel, and the highest restaurant. Its sustainable design includes reflective glass, solar panels, and one of the fastest elevators, complemented by the Dubai Fountain.