Prison Break
Alcatraz! Yeah yeah, had to go there. Not as impressive as one would think (there's nothing that can't be banalized by throngs of tourists) but it does have a certain unnerving atmosphere. You can step into "the hole", or isolation cell, and that looked like tons of fun -- claustrophobic, and, for extra measure, completely dark. People often hallucinated in there, and those cells really made me want to get the hell out of them as fast as I could. Bad Feng Shui.
As silly and walk-through as it seems today, what with the touristy crap and the constant references to the place as The Rock, it must have been an absolute hellhole. The prisoners could hear people celebrating New Year's, women's laughter if the wind was right, and they could peek over the wall to see San Francisco, and life, out there, a mile away. Just imagine.