The longest living non-clonal organisms on Earth.

A wondrous old library overlooking the nation's capital.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The oldest surviving synagogue in New York City is now a soaring art space.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

Visible below the waves are memorials to the city's Gold Rush dead.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

When ecosystems collide in the arid Southwest.

This free, take-a-book shop seems like a trick but isn't.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

European castle ruins in an American state park are actually the product of death and grief.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Less a museum than a bizarre fantasy world created by artists and engineers.

Couple's personal collection of pinball machines turned public pinball museum.

This quirky curiosity shop takes its cues from the world's bazaars.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The only rotating bar in New Orleans has been slowly spinning since 1949.

A clear blue swimming hole with hidden caves, still unexplored.

This charmingly homemade amusement park has been growing for 40 years.