The Andaman Islands are an Indian archipelago in the Bay of Bengal. These roughly 300 islands are known for their palm-lined, white-sand beaches, mangroves and tropical rainforests. Coral reefs supporting marine life such as sharks and rays make for popular diving and snorkeling sites. Indigenous Andaman Islanders inhabit the more remote islands, many of which are off limits to visitors. The Andaman and Nicobar Islands one of the seven union territories of India, are a group of islands at the juncture of the Bay of Bengal and Andaman Sea. The territory is 150 km (93 mi) north of Aceh in Indonesia and separated from Thailand and Myanmar (Burma) by the Andaman Sea. It comprises two island groups, the Andaman Islands and the Nicobar Islands, separated by the 10°N parallel, with the Andamans to the north of this latitude, and the Nicobars to the south (or by 179 km). The Andaman Sea lies to the east and the Bay of Bengal to the west. The territory's capital is the Andamanese town of Port Blair. The total land area of these islands is approximately 8,249 km2 (3,185 sq mi). The capital of Nicobar Islands is Car Nicobar. The islands host the Andaman and Nicobar Command, the only tri-service geographical command of the Indian Armed Forces. The Andaman Islands are home to the only known Paleolithic people, the Sentinelese people, who have no contact with any other people.