The island has a range of near 5 km2 (1.9 sq mi). It lies simply a large portion of a kilometer (a fourth of a mile) far from the southern bank of the principle island of Singapore. It is Singapore's fourth biggest island (barring the principle island). 70% of the island was secured by optional rainforest, the living space of screen reptiles, monkeys, peacocks, parrots and also other local fauna and vegetation, likewise, when the development of Resorts World Sentosa started, ecological effect was kept at least when more than two hundred trees in the assigned range were replanted somewhere else on the island. Encourage improvement has altogether affected on the biodiversity of the island that a great part of the fauna and greenery has been lost. The island likewise has 3.2 km (2.0 mi) extend of white sand shoreline, this has affected on the reef. Fundamentally extensive segments of land are as of now being added to Sentosa because of land recovery.

Sentosa can be come to from the Singapore terrain by means of a short boulevard or Cable Car, which starts from Mount Faber and goes through HarbourFront on the way to its last goal at Imbiah Lookout. In 2015, Sentosa opened an intra-island Cable Car to encourage going inside the island. Named the sky arrange, the Cable Car has 3 stations, in Siloso, Imbiah and close to the Merlion, and is not connected to the first Cable Car. The island is additionally available by the Sentosa Express monorail, which supplanted the old Sentosa Monorail that worked from 1982 to 2005.

Sentosa offers an assortment of attractions, historical centers and different offices to give an assortment of encounters, diversion and excitement to guests. These incorporate the incredibly famous Universal Studios and Madame Tussauds chain of attractions, and in addition a Marine Life Park, which comprises of a water stop and an aquarium. Numerous attractions on Sentosa are situated in Imbiah Lookout, which contains 11 attractions.