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

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

Memorial stone for GWAR vocalist, depicted in his iconic costume.

Location of a reliquary containing bone fragments of 18 saints.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

Carved faces add a touch of magic to this island's impressive oak trees.

An abandoned stretch of highway, deteriorating next to the operational one.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

A giant time capsule not scheduled to be cored until 2040.

This cannonball stands as a reminder of the final act of a fleeting governor amidst a revolution.

These unusual rooms on wheels are holdovers from the 1960s.

World's first "penitentiary," meant to be humane, drove men insane.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.

America's post-nuclear-attack chambers of Congress.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

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

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

The scene of the largest surrender of Confederate troops at the end of the American Civil War.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

3/4-scale model of the White House in Atlanta, Georgia.