yea, if you do an image search of cincinnati unfinished subway all kinds of pics pop up. they even have a book now you can buy about the whole process and how and why it was shut down before it was finished. i think they do occasional tours of it as well. thies pic is from 2002
OK this one is odd.
It was originally an underwater restaurant, that was then converted to a strip club. Located in Israel
it's now closed and completely sealed.