See massive fossils that are over 200 million years old in northeastern Arizona.

Once disputed as the largest sundial in the world.

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

A motel dedicated to Southwestern nostalgia.

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

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

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

The Grand Canyon’s original airport, which once welcomed pilots like Amelia Earhart and Charles Lindbergh, lies abandoned.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

The first steel dam in the world and the only one still functional in the United States.

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

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

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

This historic national park is covered in the stunning ruins of red rock pueblos.

A spiritual vortex among the red rocks in Sedona.

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

A mysterious spirit totem at the edge of Navajo lands.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

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

At 11,500 feet in elevation, there is no toilet in the state closer to the sky than this one.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.