Like Mardi Gras, only everyone's a pirate.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

The "first cat," "first dog," and even a presidential pygmy hippo all get their due in this museum.

Hauntingly beautiful totem poles left by the Haida.

A striking 12th-century-style castle built on the edge of a cliff.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

This airfield is home to a number of retired vintage planes in various states of disrepair.

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

WWI hospital ship lost in a cyclone turns up on the coast of Fraser Island, where she remains rusted and forgotten.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

This was once the center of the Birdman cult, and is now a World Heritage Site.

This locally-famous crevasse in New York State is icy all year round.

World's largest herd of white deer populate a former U.S. Army depot.

The only surviving prototype of Buckminster Fuller's revolutionary car.

A watering hole where the options for seating include a bar, patio, or subterranean cave.

A building so large that it has its own weather.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

A 1950s eccentric's vision of Eden preserved as a hiking trail.

Built in just a little over a week this preserved bunker was created to protect our most attractive POTUS while he was on vacation.

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.