Baker St underground station.
I've just had a quick google and apparently there are some platforms that are the original Victorian ones, and I think those are creepy, not helped by the weird lighting.
Oradour-sur-Glane in France, but that's not really surprising. It was the site of a WWII atrocity. After the war a new village was built near by but the old village was just left.
The houses are gradually becoming ruins and there is very little left of anything else unless it is metal so there are 1940s era cars in the street that have completely rusted.
You see the odd old metal bed frame and sewing machines.
I went with my parents in my teens, my parents have been back but once was enough for me.