15. Vatican Secret Archives, Italy
Owned by the Pope, the Vatican Secret Archives are not necessarily secret despite their name. The public can request to view a document as long as it is more than 75 years old. The restricted part about the archives is that nobody can physically enter them without the Pope’s permission. It is said that evidence of extraterrestrial life exists in the facilities and nobody is quite sure of all that can be found amidst the 84 km of shelving. It’s often only been carefully screened researchers and journalists who have been granted access to this underground reserve.