A 19th-century subterranean reservoir repurposed as a contemporary art cave.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This historic black and white monastery is one of Bulgaria's architectural jewels.

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

An alchemist's "magic door" stands in the middle of a Roman park.

These eerie outliers of the lightning bug family glow a mysterious blue color.

Monasteries on rock pillars, once accessible only by frayed ropes.

Staves, storm-calling, and of course, necropants.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This impressive tunnel was dug entirely by hand over the course of 36 years.

A self-built castle made by a mysterious man.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

The ruins of the castle that chemicals built.

The liveliest ghost town in the state.

A small flooded ghost town with a few scattered structures remaining.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.