7 places on Earth where humans are not allowed

North Sentinel Island This island in the Andaman chain is one of the most isolated places on Earth and is off-limits to civilized humans.

Snake Island, Brazil This dangerous island is off-limits to people due to its infestation of thousands of highly venomous snakes.

Area 51, USA This US military base in Southern Nevada is rumored to be a testing ground for weapons and aircraft.

Svalbard Global Seed Vault, Norway This vault stores seeds of plants to use in case the planet ever reaches the point where vegetation is wiped off or crop diversity becomes scarce.

Surtsey, Iceland This island south of Iceland was recently formed by volcanic eruptions in the 1960s and is protected from human interference.

Lascaux Caves, France This cave is regarded as one of the important archaeological sites in the world and is said to hold pre-historic paintings that date back to at least 17,300 years ago.

Niihau, Hawaii This island is known as the Forbidden Isle because it's generally off-limits to all but relatives of the island's owners, U.S. Navy personnel and government officials.