A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

The summer home of the largest colony of bats in the world.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

These abandoned grain silos and tunnels are an urban exploration dream.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The graffitied ruins stand hidden within the Pennsylvania woods.

An underwater city for the dead.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A train station that was abandoned by the coal industry and converted into a cocktail bar. Now it’s home to the local visitor bureau.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

A surprising museum of 20th-century technology.

Seven people are buried in the middle of what's now a movie theater parking lot.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

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

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.