The little state of Singapore is big on tourism, which is a major contributor the Singapore economy - attracting more than 11.5 million visitors in 2010. One of the major attractions of Singapore is its unique cultural diversity. A mix of Chinese, Malay, Indian and Arab ethnicities make for a rich and exciting experience. Singapore is also blessed with one of the lowest crime rates in the world, and with English being the dominant official language it is an ideal destination for the culture-hungry international visitor. The Orchard Road district is is full of multi-storey shopping centers and hotels and is very much the tourist center of Singapore. Popular tourist attractions in Singapore include the Singapore Zoo, and the Night Safari, which gives visitors the opportunity to see animals without any visible barriers. The Singapore zoo is an open zoo that keeps animals in open enclosures with moats and no fences. The tourist island of Sentosa attracts 20 million visitors per year and has over 20 famous landmarks. Singapore is also home to two "integrated resorts" that include casinos: Marina Bay Sands and Resorts World Sentosa.