The museum chronicling a treasure hunter's dream, fulfilled.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

A man-made island in scenic San Francisco Bay.

One time home to turn of the century explosives, now hidden under the Bay Bridge.

The rusting remains of the largest assembled WWII fleet on the West Coast.

The echoes of a railroad town that solemnly mark the end of the line.

Towering basalt columns, a creation of fire and ice.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

"Excuse me sir, your submarine is blocking my building."

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

This small-town pizzeria won the Hollywood lottery.

Home to items never before seen by the public.

The "lovely red Vega" of the legendary record-settling pilot.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

The maritime museum that boasts the largest nautical library in the western hemisphere.

A maritime museum holding the remains of Blackbeard's pirate ship.

This famous city eluded concrete detection until the early 2000's.

A marvel of Byzantine engineering under the streets of Istanbul.

An opal mining town in the middle of Australia where people live, worship, and shop underground.