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

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

These medicine cabinet staples are part of the museum's collection of everyday objects.

This public space is speckled with the eerie remnants of a defunct amusement park.

Alexander Hamilton’s creation caused quite a bit of controversy.

The abandoned coal loading dock is a canvas for unsanctioned art.

Locals call this magical moss-covered walkway the "Emerald Path."

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

One of the first commercially successful anthracite-powered iron-making operations in North America.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

Once luxurious, these oceanfront beach homes have been left to succumb to the elements as the beach is slowly washed away.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

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

An innovative attempt to break a siege in the American Civil War still scars the earth today.

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

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

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

This labyrinthine resting place of Black American leaders has been reclaimed by nature.

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

The last of nine massive kilns that produced many of the red bricks for buildings in Washington, D.C. and northern Virginia in the early 20th century.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

The largest known open fault in the United States is basically a giant natural refrigerator.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.