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

An off-grid art installation that encourages its visitors to imagine a world without waste.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

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

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

These unique volcanic rock formations offer the perfect opportunity to camp and hike.

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

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

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.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

Two creeks flow out of either end of this canyon in opposite directions.

A river runs through this remote valley in a very unexpected way.

This interpretive path lets you get up close and personal with dinosaur bones.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This record-setting hydraulic dam in the Montana badlands was one of FDR's most ambitious public works.

Where one of America's greatest songwriters lived before he was Bob Dylan.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

The site of the notorious Camp Sumter Prison is now a peaceful memorial.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.