America's first public mental health facility.

This historic mansion was built as a symbol of love between a husband and wife.

A small Richmond island dotted with the remnants of hundreds of years of history.

The skeletal white beams stand as a monument to religious dissent.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

The highest point in Virginia can only be reached by passing through ponies and flowers.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This abandoned artificial island off the coast of New York City is now home to dozens of harbor seals.

Once America's longest-manned military fort, now an abandoned hulk.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

A quirky collection of outsider art made from automobile parts.

Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

This secluded walking trail is a hidden gem of a Pittsburgh park.

"Where the ducks walk on fish."

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

Pittsburgh's literal underground railroad.