A Museum of Psychiatry in a still-operating mental institution.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

The prototype for all Nazi concentration camps.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A striking 12th-century-style castle built on the edge of a cliff.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The fairy tale castle of the "fairy-tale king."

A massive, heart-shaped, wind-carved crater in the middle of the Israeli desert.

This family tattoo parlor has been inking religious pilgrims in the Middle East for 700 years.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

Five candy-colored villages on the Italian Riviera.

A 16th-century horror show built in a lovely Italian garden.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.