EDIT: I do want to clarify, these are NOT my pictures. I just wanted to post the link because I thought the whole set was awesome.
I don't know if this has been floated around or not, but this is a tour of an old Russian Typhoon class submarine in mothballs. Pretty incredible, they are the largest submarine ever built, and to see some of the things in it is amazing. They had full machine facilities, exercise rooms, and even a small swimming pool!
(This is my first post here, if I did something wrong, please feel free to delete/move it or whatever needs to be done)