This chest hospital with a dark, haunted past serves as a fitting set for horror films and a paradise for ghost hunters.

This ancient Spanish castle sits high upon a hilltop.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

This imposing modern citadel started out as a home renovation project.

The Gaudí-inspired building that was the start of Terrassenc modernism.