This multi-story wooden waterpark offers homemade thrills.

The perfect place to take a family of giants for a beach vacation.

During World War II, blimps were a key part of the United States' defense against German U-boats—this building could house a dozen of the armed airships.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

So many migrating birds roost on the bridge, it has a special summer speed limit.

The only pachinko parlor in the United States.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

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

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

The lost ruins of the forgotten ferry lie hidden beneath the silt.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

The biggest solar telescope in the world helps reveal the secrets of our sun.

The cinder cone volcano with a less than complimentary name.

The eroded core of an ancient volcano is now accessible by a short hike.

A geological mystery on Camelback Mountain.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.