This abandoned horse racing track was an exercise in hubris from its inception.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

This small, unassuming street is now a canvas for color and creativity.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

Once a year, at exactly 11:11 a.m., this monument comes to life.

Legend says train robbers stashed their gold within the depths of this unusual cave.

Take a monster truck tour around an ostrich farm in the middle of the desert.

This giant steer-skull edifice refuses to die.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

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

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

These free-roaming horses were once destined to disappear from the land.

An artificial crater field that trained astronauts for lunar exploration.

This golf ball–shaped former desert real estate office now houses a UFO museum.

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

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

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

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

Limestone caves with spectacular showcase chambers.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

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