Some of the most secretive/banned places that one can never visit on earth

Some of the places on earth where no one can access nor get any permission so to visit them.

Here are some of them:

1. Svalbard Global seed vault | Norway
   Svalbard Global Seed Vault in Norway is humanity's last stand against a global food crisis. It is located on the island of Spitsbergen near Longyearbyen in the remote Arctic Svalbard archipelago, about 1300 kms from the North pole. The vault functions as a safe deposit box for almost every available seed type. 

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2. Ni'ihau | hawaii

It is an island with population of around 170 people (According to the 2010 Census). Ni'ihau is place where people live rent free, and do without paved roads, telephone services, plumbing, running water or stores. Groceries come by barge. Outsiders have been outlawed since 1915. 

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​3. RAF Menwith Hill | England
It is a military base in North Yorkshire, England. It is believed to be the biggest electronic monitoring station in the world, intercepting communications to gather intel for the US and the UK.

4. Vatican Secret Archives| Vatican City
It is perhaps the most private library in the world. It contains the personal documents of all the popes dating back to the 8th century. The archives also contain the state papers, correspondence, papal account books, and many other documents which the church has accumulated over the centuries.

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5. Area 51| Southern Nevada
It is a secretive site located some 80 miles to the north of the city. The term Area 51 was coined in the Vietnam War-era. The military base's current primary purpose is publicly unknown; however, based on historical evidence, it most likely supports development and testing of experimental aircraft and weapons systems.