Mausoleum, China
Located in Lintong District, Xi’an, Shaanxi (China), Qin Shi Huang’s tomb was discovered when the Terracotta army was unearthed in 1974, and the tomb hasn’t been excavated yet.
Room 39, North Korea
Created in the late 1970s, it is one of the most secret organizations in arguably the world's most secretive state
Coca-Cola vault in Atlanta, United States
Recipe for Coca-Cola is considered one of the best-kept secrets in the world — and they keep it secret by stowing it away in a large security vault
Snake Island, Brazil
This island might seem the ideal exotic spot in which to lose yourself but the truth is that for decades the place has been uninhabited due to having been completely invaded by lethal snakes
North Sentinel, Andaman and Nicobar Islands
While its geography makes it one of the most isolated places on Earth, North Sentinel is full of mangroves and surrounded by coral, has remained virtually untouched by the outside world
Bhangarh Fort, India
This cursed fort was built by the ruler of Amber Kachwaha for his youngest son in 1573 and gradually its population dwindled until 1783 when a strong famine forced the villagers still living there to flee
North Brother Island, United States
Access is forbidden to North Brother Island without prior authorization since all its buildings are in a dangerous state of deterioration
Diego García, British Overseas Territories
Located between East Africa, the Middle East, and Southeast Asia, Diego García is an important strategic asset for the US Navy, which has a major military base there
Svalbard Global Seed VaultThis provides security of the world's food supply against the loss of seeds in genebanks due to mismanagement, accident, equipment failures, funding cuts, war, sabotage, disease and natural disasters
Lascaux Cave
A Palaeolithic cave situated in southwestern France, near the village of Montignac in the Dordogne region, which houses some of the most famous examples of prehistoric cave paintings. Close to 600 paintings mostly of animals
The Chernobyl Nuclear Power Plant Zone
This zone is an officially designated exclusion zone around the site of the Chernobyl nuclear reactor disaster
Ni'ihauThe island is a pristine, critical habitat for highly endangered species, and one of the most-coveted travel destinations in the world
Surtsey Island
Ever since its creation in November 1963, it's been heavily protected. The only ones allowed to visit Surtsey, to set foot on the island are authorised scientists