The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

This park contains a number of standing stones meant to heal and inspire.

This jail which was in service for over a century is now open for curious visitors.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

A field of nothing but boulders which resembles a giant's gravel driveway.

Narrow gorges and deep pools created by long-ago glaciers.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

It would take 35 firetrucks to fill this enormous glacial pothole.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

Built to hold the worst of the worst of the Nazi war prisoners.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

Possibly the world's smallest museum is home to one exhibit that sheds light on the capital city's dark criminal history.