Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A Wild West saloon that helped define a generation of psychedelic rock.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

The beautiful behemoth is one of the largest trees of its kind in the United States.

One incredible room in the Santa Barbara Courthouse is covered in wall-to-wall canvas murals.

Art Deco stylings conceal the true nature of this bridge.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

I Street Bridge is the heaviest swinging center bridge in the United States.

This 19th century train workshop is a treasure trove of railroad history.

The California capital city once stood 10 feet lower than it does today.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

The unusual patterns in this rock formation result from two distinct modes of weathering.

The magic's in the hole!

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

A historic landmark and museum filled with curious objects representing the history of Key West.

Near the ruins of a Civil War coastal fortress lies the only known African refugee cemetery in the United States.

The highway's southernmost spot is a beloved local attraction.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

A monument celebrating the idea of reaching inaccessible places.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

Here’s how Robert the Doll earned his reputation as the most haunted doll in the world.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.