- Lotte World Co., Ltd
- 478 metre(s)
- Korea (Republic of) (Seoul)
The highest glass-floor observation deck is the Sky Deck which is 478 m (1,568 ft 2.8 in) high, built by Lotte World Co., Ltd (South Korea) in the Lotte World Tower, Seoul, South Korea, as verified on 23 January 2017.
45 mm (1.7 in) thick glass makes up the floor, which is capable of supporting over 500 kg (1,100 lb ) per square metre. 3 of the deck's walls are also made of glass, allowing visitors panoramic views.