There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

Oldest building in California still in use.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

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

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

The oldest farmer's market in America is so ancient it was approved by the King of England.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.