This abandoned prison castle has become an imposing gallery of graffiti art.

If astronomy had a ghost, it would look like this observatory.

This shop for all your super spy needs hides an educational secret.

A Bibliophile's Dream.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

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

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

Unique Michigan homes look like something out of Tolkien's "The Lord of the Rings."