A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

Site where Moses may have received the Ten Commandments.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

This one-time health resort was used by aristocrats around the world.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

More than five miles of underground passageways.

Railroad came. People came. Railroad left. Town died.

Visit this playground of waterfalls, caves and sinkholes.

Enormous lake at the bottom of a unique cave system.

This overgrown Illinois water park offers a whole new type of adventure.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

Beautiful waterfalls grace a canyon visibly torn by a violent tornado.

Italian cave with exceptional acoustics and an unsavory history.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The ruins of a once-grand mansion in Northern Ireland are now thought to be haunted.

The angel of death appears to weep black tears at this grave marker.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

Small, privately owned island divided between Michigan and Ohio with abandoned vacation homes and a derelict lighthouse.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.