The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

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

This historic trading post has been serving the community since 1913.

John Wayne, Ronald Reagan, and other Hollywood actors have resided in this picturesque Route 66 hotel.

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

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

This collection of vintage signs reflects the long and colorful history of this Arizona town.

Whether or not you take the 72-ounce steak challenge, there’s plenty of history, fun and Texas-style food at this legendary stop along Route 66.

A Norman-style castle, 1850s Irish cottage, and cultural center in the heart of Phoenix.

The easternmost town in Alaska can only be accessed from Canada.

The northernmost international land border crossing in the United States.

A colossal gold-dredging machine from the Klondike mining boom, now open to tours.

A lasting testament to the Klondike Gold Rush.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

Meet 'Big Josh,' the 20-foot-tall muffler man.

With beautiful views and every detail perfectly considered, one of the geniuses of modern architecture built himself the perfect home.

A museum dedicated to the life and career of the gifted but controversial general.

The ghostly remains of an accidental sea.

Version of the French Riviera destroyed by the sea.

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

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

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