When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This balancing rock is one of Utah's most unusual geological formations.

Giant trolls run this farm!

Ever wanted to can Spam?

A ghost town now swarming with dozens of prairie dogs.

One of the first intercontinental ballistic missile sites in the United States.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

See massive fossils that are over 200 million years old in northeastern Arizona.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

An interesting look into 18th-century American history.

A 10-foot-tall concrete Alley Oop statue left over from World War II now stands on the side of the road.

Siberian husky that delivered a life-saving antitoxin.

This decommissioned DC-3 now forever points into the oncoming wind.

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

A monument commemorating the role of Alaska's native Tlingit guides in the Klondike Gold Rush.

Dozens of rockets and missiles are on display outside a testing facility in the Utah desert.

The notorious Wild West outlaw was raised in this unassuming abode.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.