Place to see: Nijo Jinya, Ky?to-fu, Japan

About this place:

Nijo Jinya is a former inn used by feudal lords (daimyo) who were visiting Kyoto during the Edo Period. In order to guarantee the safety of the important guests, the building has been equipped with secret pathways, trap doors, hidden escape routes and various other security gadgets.

Tours of the intriguing house are held in Japanese only. If you do not understand Japanese, you are asked to bring a Japanese speaking friend or guide for your own and the owner's interest.

Also I should note that cameras are not allowed inside. It is absolutely worthwhile though to still visit.