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

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

The longest living non-clonal organisms on Earth.

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

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

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

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

An artificial crater field that trained astronauts for lunar exploration.

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

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

Come for the speed, leave in love with the desert.

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

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

Massive still life just off the highway in Kansas.

An abandoned amusement park based on the popular 1940s Red Ryder comic strip.

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

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A shady solar power system that couldn't hold up to the harsh desert conditions.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

"I did this all while you were watching TV."

The fictional star of "Breaking Bad" is memorialized with a real-life gravestone in his hometown.

Deadly airliner crash preserved for those willing to climb and pay respects.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.