An unusual geological feature towers over the remains of a dark episode in United States history.

Cabins once lived in by Butch Cassidy and the Sundance Kid are featured at this Old West living history museum.

At the time of its completion, it was the tallest dam in the world.

One man's ambition created this psychedelic log home.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

Mining caused an asbestos emergency in this small town.

Considered by many to be one of the most dangerous highways in Alaska.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

The beginning of the historic Iditarod Trail connecting the Alaskan cities of Seward and Nome.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

The king of U.S. high points towers over every other peak on the continent.

Four-story concrete hotel never opened to customers.

The collection includes seven one-of-a-kind automobiles, vintage fashion, and more.

The sculpture's largest spire points directly toward the North Star.

This mile marker stands at the unofficial end of a highway built to defend the United States from a Japanese invasion during World War II.

Once the center of Gold Rush mania, now the starting point for the Yukon Quest sled dog race.

A trading post in the North Pole where children send letters.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

The northernmost international land border crossing in the United States.

A giant poultry statue immortalizes one of Alaska's more humorous town names.