Adventure Secrets

There are always a few things in our adventures that are taken from the real world, maybe even someplace we’ve been, and then modified slightly to be used as the basis for a town, castle, etc. Our thought in doing this was to add realism and another layer of interest to our work. We also thought it would make a fun game. We’re wondering if anyone can figure out what place we used as the basis for the Fort of Fire and Ice in the Blackstone Tomb adventure?