Deep underground, the rusting remains of a German water pumping station from World War II.

This was the second largest mercury mine in the world and one of the oldest preserved mine complexes in Europe.

This former railway facility is the oldest in Slovenia, and now houses a museum showcasing the history of steam locomotives.

The costumes depict the Kurent, the star character of the annual Kurentovanje festival.

This small Slovenian town has become a magnet for microbreweries.

A beautiful drive through the foot of the Alps traces the path of 15th-century Turkish raids.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This massive subterranean fissure is known as the "underground Grand Canyon."

This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

A former major munitions plant that has been converted into a sprawling art space.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Crumbling pyramids and temple ruins stand within the shadow of this sacred butte.

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

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

Founded in 670, this ancient mosque is an architectural time portal.