A tunnel with windows, so you don't miss out on the impressive views.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

A house carved into a rock in the 1940s.

A disciple of Frank Lloyd Wright built an experimental, partially underground home in the desert.

A Wild West jailhouse that slid down the mountainside.

An urban laboratory.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

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

A sharp bend in a dramatic river canyon cut through red rocks.

Where a guard killed nine German prisoners during one of the worst 20th-century POW camp massacres in U.S. history.

More than a century old, this trading post resides in the Navajo Nation.

An homage to everyone's favorite prehistoric cartoon family.

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

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

This small museum is dedicated to the study of coprolites, or fossilized poop.

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

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

A stealthy Apache hideaway that became the haunting site of a mass grave.

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

This memorial includes fragments from one of the greatest tragedies in United States history.

A motel dedicated to Southwestern nostalgia.