A hidden alley in urban Baltimore is a haven for graffiti artists.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

The resting place of a Civil War celebrity's amputated limb.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

Hiding amid the largest camellia collection in the country lies a charming children's maze, donated by a secret admirer.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Home to the "Circus" trees created by Axel Erlandson.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

A trash dump made beautiful by nature's power.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

A monumental cross hides in the trees in Golden Gate Park.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

Decades before the scandal, this staircase on the river was a literal "water gate."

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

An overlooked memorial honoring the local Washington residents who died in World War I.

The national park was once a plantation estate.

The narrowest house in America is seven feet of pure spite.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.