Hashima Island
Also known as the Battleship Island, Hashima Island is an island situated approximately 15km off the coast of Nagasaki. Once a thriving industrial town, when mining activities ceased on the island it was closed in 1974, and since been abandoned. A bit like Pripyat in the Chernobyl Exclusion Zone. We can see that nothing much changed after all these years, with abandoned buildings standing still, like a ghost town. But the good news is, people can supposedly visit Hashima Island under certain conditions. Heres a fun fact, this is also the filming location for the movie Skyfall (James Bond).
Vatican Secret Archives
Honestly this sort of makes sense. Vatican City, the smallest country in the world and also includes one of the most secretive archives in the world – the Vatican Apostolic Archives. It is barred because of the extremely valuable documents that are kept inside. It contains priceless archives, including letters about King Henry VIII’s appeal to divorce Catherine of Aragon. as well as the original acts of the 1633 trial of astronomer Galileo. It is logical as to why it is barred. But the good news is that although you may not be able to enter the archives, you might be able to see the content, but only in the near future.