These strange large stones served as a campsite and lookout post for generations of Native Americans.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

A small Richmond island dotted with the remnants of hundreds of years of history.

A quintet of history museums make this Virginia graveyard as much a resting place for funereal history as it is for people.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

People escaping slavery may have hidden inside a corpse vault.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

An Industrial Revolution-era public work that purified water using nothing but sand.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

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

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

A site of natural wonder and flying coconuts in Samoa.

A tiny, remote island packed with wonders both natural and geeky.

Tropical paradise strewn with hundreds of World War II wrecks.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

This retro underwater observation tower would make the perfect lair for a sea-loving villain.

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.

A magnificent collection of imperial armor and weaponry.

Spend the night in this formerly abandoned traditional Scottish village.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.