The largest caravanserai in Cyprus also includes amazing examples of Ottoman architecture.

The central mosque of this Mali town is entirely built from mud.

This medieval wine press is one of the oldest in Cyprus.

The ruins of this former mining boomtown once housed over 3,000 people. Now, the population is two.

An automaton perched above an classic clock and watch store

Pilots from around the world come to this park to fly gliders.

Goethe's "Faust" was inspired by these rock formations known as the "Devil's Pulpit" and "Witches' Altar."

On the highest peak in the Harz Mountains, science and the occult faced off in a failed attempt to turn a goat into a boy.

A strange rock formation with numerous legends trying to explain it.

This enchanting mountain plateau celebrates spooky local folklore.

Lithuania's outdoor sculpture trail of wooden folk art.

Stone age urban planning.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

A Christian retreat founded to welcome refugees fleeing from the Nazis during World War II.

Stuffed people arranged in unsettling scenes give a voyeuristic glimpse of life within a historic old hotel.

Mysterious standing stone formations looks like a petrified forest.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

This former Soviet military base has over 10 original aircraft and an enormous amount of memorabilia on display.

An abandoned film set location for a remote spaceport in a galaxy far, far away hides in the Tunisian desert.

A 15th-century granary that played the role of futuristic slave quarters in the world of 'Star Wars.'