6. Lotte World Tower, South Korea- 555 Meters
Completed in 2016, Lotte World Tower stands 555 meters tall with 123 floors above ground and 6 basement levels, making it the tallest building in Seoul, South Korea. Designed by Kohn Pedersen Fox Associates (KPF), the tower houses luxury apartments, office spaces, a hotel, retail zones, and the Lotte World Mall.
One of its main attractions is the Seoul Sky Observatory, including a thrilling glass-floored skywalk at the top. The sleek, tapering design was inspired by traditional Korean ceramics, blending cultural elegance with modern engineering and LEED Gold-certified sustainability.