A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

This deceivingly ordinary warehouse hides an enormous collection of pop culture treasures.

A bypass decorated with large wooden troll carvings.

This cave holds a surprisingly colorful variety of geological oddities.

A bizarre house filled with an astounding array of collections.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

One Austrian's singular yard is now preserved as a folk art garden of concrete wonders.

A former barn converted into a massive train diorama.

The Kalamazoo factory has 100 years of instrument-making, and one big wartime secret.

One woman's lifelong collection is on display in this unassuming house on an Icelandic fjord.

This elderly couple's hand-picked collection of rare gems is one of the finest in all of Iceland.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

The first spinning jail built in the United States is the only one that still turns.

The first artificial white water river course in North America cuts right through an Indiana city.

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

The final resting place of the world's first nuclear reactor.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

A Museum of Holography frozen in 1974.

Chicago’s incendiary role in the labor movement.