The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

America's only nuclear missile silo open to the public.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Part bookstore, part café, and part forest.

Money made from smuggling sugar helped create this wondrous rock maze in honor of the Prussian Queen Louise.

This crumbling folly looks like an enchanted left over from Middle Earth.