North Sentinel Island, India: This remote island is home to one of the last uncontacted tribes in the world, and entry is strictly prohibited to protect their way of life.
Room 39, North Korea: This secret location is believed to be the headquarters of the North Korean government's illicit activities, such as counterfeiting, drug trafficking, and weapons smuggling.
Vatican Secret Archives, Vatican City: The Vatican's archives contain millions of documents related to the Catholic Church's history, and only a select few scholars are granted access to them.
Area 51, Nevada, United States: This US Air Force facility is shrouded in secrecy and is believed to be a testing ground for experimental aircraft and weaponry.
Poveglia Island, Italy: This small island off the coast of Venice was used as a quarantine station for the bubonic plague, and it is now off-limits due to paranormal activity and toxic soil.
Snake Island, Brazil: Located off the coast of Sao Paulo, this island is home to thousands of venomous snakes, and entry is strictly prohibited to protect visitors from potential harm.
Svalbard Global Seed Vault, Norway: This facility stores seeds from around the world to protect against crop failures and natural disasters, and access is strictly controlled to prevent contamination.
Mezhgorye, Russia: This closed town is believed to be the location of a secret nuclear bunker and missile base, and entry is strictly prohibited.
Chapel of the Ark of the Covenant, Ethiopia: This chapel is believed to house the Ark of the Covenant, which is a sacred relic in Ethiopian Orthodox Christianity, and entry is restricted to a select few priests.
Mount Weather Emergency Operations Center, Virginia, United States: This underground facility is designed to serve as a command center for the US government in the event of a national emergency, and entry is restricted to authorized personnel only.