Triangular House built on a leafy residential street in St. Paul.

These curious caverns have been home to mushrooms, gangsters, and disco.

An unusual assortment of art, furniture, and other curiosities.

An old soap company building now houses one of Minneapolis’s oldest independent non-profit art galleries.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

Rippling sand dunes frozen in the Arizona rock.

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

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

A geological mystery on Camelback Mountain.

A museum and tribute to a brave profession.

A self-built castle made by a mysterious man.

A mysterious "wedding cake" castle in the middle of the urban desert.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

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