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.

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

For over a century, it has been a tradition to raise a flag at the top of this 450-foot sandstone pillar on the 4th of July.

This open-air reconstruction of an Old West town, a cross between a theme park and a museum, provides an immersive historical experience.

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.

These free-roaming horses were once destined to disappear from the land.

This Old West prison built into the side of a cliff was said to be inescapable.

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

A monument commemorating how a frontier town got its unusual name.

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

A motel dedicated to Southwestern nostalgia.

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

A unique collection of artistic rides

The site where Michigan launched its first rocket into space lies abandoned in the dense woods along Lake Superior.

This missionary's legacy looms large over the Upper Peninsula of Michigan—literally.

A comedy troupe's collection of bizarre humor.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

"The Most Boring Road in the State."

Two dozen rescued bears roam (mostly) free at the largest bear ranch in the U.S.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Island where motor vehicles are banned -- home to the only carless highway in the United States.