The symbol was surreptitiously built into the river bank by German prisoners of war.

The ruins of this former mining boomtown once housed over 3,000 people. Now, the population is two.

The former home of the army detachment that captured Geronimo.

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

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

This small interfaith chapel lies not far from the rim of the Grand Canyon.

Visitors to this public park will also find the ruins of an old western fort.

In 1975, a forestry worker in Arizona claimed to have been abducted by a UFO.

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

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

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

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

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

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

America's only nuclear missile silo open to the public.

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

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

The handsome statue is a tribute to the post riders who traversed 52 miles of tough Arizona terrain.

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

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

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

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

Recycling meets art in this colorful barricade.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.