This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

One man's ambition created this psychedelic log home.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

Ancient pueblos built into the base of a natural canyon wall.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

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

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

Outsider Art Community.

A self-built castle made by a mysterious man.

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

Rippling sand dunes frozen in the Arizona rock.