6. North Sentinel Island
Located in the Bay of Bengal, North Sentinel island is one of the Andaman Islands, where a group of indigenous people, the Sentinelese, live. Their population is estimated to be between 50 to 400 individuals and they reject any contact with other people. The Sentinelese are among the last people on earth to remain virtually untouched by modern civilization. While recent attempts to contact the tribe have been made, they were not well received, and tribesmen used arrows and stones to block visitors from entering the island.
5. Vatican Secret Archives
Until 1881, the Vatican Secret Archives were closed to outsiders, then Pope Leo XII opened them to selected people. The archives are not so much of a secret nowadays as thousands of researchers examine its documents each year. Nevertheless, given that the archives contain 52 miles of shelving, some have suggested that dark secrets from the past could be lurking, waiting to be discovered. Some documents in the archive include Henry VIII of England’s request for a marriage annulment, and letters from Michelangelo complaining about late payment for his work.