Located in the Bay of Bengal, it is home to the Sentinelese tribe known for their isolation and hostility towards outsiders.
Formed by volcanic activity off the coast of Iceland in 1963, it has been strictly protected as a scientific research site.
A British territory in the Indian Ocean leased to the United States, serving as a military base and inaccessible to the public.
Situated off the coast of Brazil, it is infested with venomous golden lancehead snakes, making it extremely dangerous to visit.
Privately owned by a single family in Hawaii, access is restricted to protect the native Hawaiian culture and maintain the island's privacy.