This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

A small-town limestone memorial to a local cartoonist and to Porky Pig, his most famous subject.

This roadside prairie Statue of Liberty replica is one of the foremost examples of the Boy Scouts of America's "Strengthen the Arm of Liberty" campaign.

A standalone wonder amid the prairie badlands of southeastern Alberta.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

This giant meditative chakra sits peacefully in the Flathead Valley of western Montana.

There are no bodies inside these stone coffins. And there never were.

Though it's no longer a functioning train depot, this castle-like structure is an important piece of Oklahoma history.

The final resting place and once home of the Bandit Queen of the West.

This gravestone tells the tragic tale of its occupant's death.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

This remote site in the Australian Outback is where the British government conducted atomic bomb tests in the 1950s.

At low tide, you can see the remains of a 17th-century ship just off a Stockholm island.

This gravity-defying rock formation is one of Big Bend’s natural wonders.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

Once a bustling cotton factory, this early 20th-century building is now home to a thriving artspace.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

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

A motel dedicated to Southwestern nostalgia.

One man handcrafts "the best sake made outside of Japan" in a tiny desert town on Route 66.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

The world's only surviving heavy cruiser has a haunting history.

The first mountain submarine had its initial and last voyage in 1898.

Catch two 18-foot-tall ranchers mid-brawl as you drive by on Highway 285.