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Sentosa Island, known mononymously as Sentosa, is an island located off the southern coast of Singapore's main island. The island is separated from the main island of Singapore by a channel of water, the Keppel Harbour, and is adjacent to Pulau Brani, a smaller island wedged between Sentosa and the main island. Formerly used as a British military base and afterwards as a Japanese prisoner-of-war camp, the island was renamed Sentosa in the 1970s to become a popular tourist destination. It is now home to a popular resort that receives up to 25 million visitors per year. Attractions include a 2.5 km (1.6 mi) long sheltered beach, Madame Tussauds Singapore, an extensive cable car network, Fort Siloso, two golf courses, 14 hotels as well as the Resorts World Sentosa, which features the Universal Studios Singapore theme park and one of Singapore's two casinos, the other being in Marina Bay Sands. Sentosa is also widely known as being the location of the 2018 North Korea–United States Singapore Summit, where North Korean Chairman Kim Jong-un and U.S. President Donald Trump met at the Capella Singapore located on the island. This was the first-ever meeting between the leaders of North Korea and the United States. As an island geared towards recreation and tourism with its casino and resorts under a tropical climate, as well as residences for the wealthy, Sentosa is more than twice the size of Monaco.