Spend the night in this formerly abandoned traditional Scottish village.

Take an underground boat ride through a former hydraulic raceway that was built in the late 19th century.

Portland had a unique approach to Cold War-era protections.

A self-built castle made by a mysterious man.

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

Beyond being incredibly fun, not much can be said about the Hole with certitude.

A small, fascinating fire museum hidden in plain sight in an administrative building.

This exhibit allows visitors to wander through the interior of a replica Ice Age glacial cave.

A journey through military artifacts and the history of Cortland.

An off the grid woodland retreat that harkens back to days long forgotten.

The shared home of a utopian commune that practiced "free love" a century before the hippies.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

An abandoned asylum where patients have been forgotten but their possessions remain.

A toxic ghost town sitting atop a massive coal fire.

This Central New York ghost town was once a prosperous railroad community.

The graffitied ruins stand hidden within the Pennsylvania woods.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

This abandoned school has had many lives since the early 1900s, and all of them doomed.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

This abandoned amusement park was built on a site with a dark history.