The lobby of this hotel near the U.S.-Mexico border features a stained-glass mural that measures 42 feet long and 6 feet tall.

This pub boasts a curious history and may have inspired a Dickens character.

A popular tourist cave with a dark past.

A hidden gem in the middle of the city's infamous Jewelry Quarter.

The only thing still moving in this town is the eponymous hot spring.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

This trench, some 2,300 feet long, is only the most prominent relic of a largely forgotten episode of placer mining on the east slope of the Sierra Nevada.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The commemorative stone column conceals a secret laboratory.

A Roman-style column in Oregon hides a spiral staircase inside.

This coffee shop lies hidden beneath a historic church.

This bakery sits on the site of the Black Panther Party's first headquarters.

Outside San Francisco lies a small clown cemetery and memorial.

A bronze tribute to a legendary Californian, the self-proclaimed "Emperor of the United States."

One of the best-preserved ghost towns in Arizona speaks to the difficulties of establishing mining towns in the 19th century American West.

Stone markers on the campus of Gallaudet University commemorate a peculiar school tradition.

These markers are used to determine the ground stability of the Strip.

Some believe that the stone once used to coronate Scottish kings resides inside this bar.

A historic cemetery filled with quirky faux wood art and unique tombstones.

Evidence of a long-ago crush remains scratched into the glass at this historic Maryland House.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

These banned cigarette vending machines now sell little pieces of pocket-sized art.