Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

The remains of a boarding school designed to forcibly assimilate Native American children.

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

The first steel dam in the world and the only one still functional in the United States.

A stone pillar commemorates the surrender of the extraordinary Apache leader.

Make a wish at what might be America's only Catholic shrine to a sinner.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

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

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 oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

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

The first permanent memorial to a unique secret weapon of World War II.

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

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

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

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

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

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

The eroded core of an ancient volcano is now accessible by a short hike.

A geological mystery on Camelback Mountain.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

This sanguine boulevard was named after a deadly cowboy bar fight.