The Supertree Grove Observatory Deck is a popular tourist attraction located in the Gardens by the Bay in Singapore. The Supertree Grove consists of 18 tree-like structures, ranging from 25 to 50 meters in height, that are covered with a variety of plants and provide an impressive display of vertical gardens. Supertree Grove Observatory Deck: A Must-Visit Attraction in Singapore 2023 At the Observatory Deck, visitors can enjoy a panoramic view of the Gardens by the Bay and the surrounding cityscape from a height of 50 meters above the ground. The deck is located on top of one of the Supertrees and can be accessed by an elevator that takes visitors to the top.