Since we're talking about Silent Hill, inspiration for the game, but especially the movie, was drawn from Centralia, Pennsylvania.
https://en.wikipedia.org/wiki/Centralia,_Pennsylvania
You may remember it tor the coal mine that's been burning since 1962. I seem to remember it having been mentioned somewhere (here?) during a discussion on "abandoned" underground tunnel systems in many cities, namely those on the west coast.
Maybe there's an underground tunnel system around the finger lakes?