This 19th-century building inadvertently preserved the handprints of its builders within its walls.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

The prototype for all Nazi concentration camps.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.