A hand-built folk art installation covered with messages of God's love.

This ancient trail has claimed the lives of over 2,000 people.

Once a slice of Cold War-era military history, this museum is finding its future in the star.

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

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

Limestone caves with spectacular showcase chambers.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

The remains of a large pueblo village constructed by the Salado culture, who occupied the region more than 600 years ago.

Ancient human, animal, and geometric figures drawn in the earth.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

This church on a Tohono O'Odham reservation has stood since 1797.

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

At an isolated roadside rest area stands a monument marking where famous Western star Tom Mix died in 1940.

A reproduction of earth's many biomes.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.

The biggest solar telescope in the world helps reveal the secrets of our sun.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

One of the largest open-pit copper mining operations in the entire country.

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

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

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

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

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

This giant steer-skull edifice refuses to die.