About the deck
Seoul Sky is the observation facility at floors 117-123 of Lotte World Tower, South Korea's tallest building. The main observatory level at floor 118 sits at 499 metres, level with the building's highest occupied floor. The complex spans multiple levels including a glass-floored Sky Terrace at 478m, a lounge, and a sky walk with curved glass walls extending beyond the building face.
On clear days, views extend to the mountains north of Seoul and the Yellow Sea. Lotte World Tower's 10.1% Vanity Ratio places it among the more honest supertalls - occupied floors reach almost to the summit..
The honest take
The glass floor sections at Seoul Sky are engineered to the correct specification - they actually make you feel exposed. The 499m elevation is matched by the Korean pop-culture context of the surrounding Jamsil district, making this the only observation deck where the view includes a theme park directly below.
See the full height breakdown: Lotte World Tower profile.
Height in context
Elevation data
Deck elevation: 499m (1637 ft)
Floor: 118
Access type: Indoor / enclosed
Data notes
Height and floor data sourced from Wikipedia (CC-BY-SA). Ticket prices verified from official sources on 2026-05-09. Prices change frequently - verify before booking.
Affiliate links are deferred pending program approval (Viator, GetYourGuide, Tiqets). We are disclosing this upfront per FTC, ASA, and EU affiliate disclosure requirements.