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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

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.

Rippling sand dunes frozen in the Arizona rock.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A museum dedicated to the alleged Roswell Incident.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This quirky outpost and gallery inside a former church is an unexpected trove of handcrafted art.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

A Texas museum filled with Broncos and Betties.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

It specializes in outsider art and artifacts of secret societies.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Mysterious glowing orbs float through the desert night.

Fantastic collection celebrating the final send-off.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

DIY collection of eclectic holdings.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

One part antique store, one part curiosities hodge-podge.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.