Oldest building in California still in use.

These lush groves of fan palms rise up like oases out of southern California's Colorado Desert.

The sea once considered an ecological wasteland is now called "crown jewel of avian biodiversity" by scientists.

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

Diego Rivera hid various people and symbols in his first large-scale mural project.

A spiritual vortex among the red rocks in Sedona.

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

A historic freight system that found the true gold rush is in tourism.

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

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

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

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

A fitting attraction for the corn capital of the world.

This was the first homestead registered after President Abraham Lincoln signed the Homestead Act into law.

This erect, phallic geological spire wasn't always named so domestically.

America's largest man-made forest was planted in an effort to bring back the past.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

Four ionic columns from the Treasury Department building ended up in a park in Nebraska.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

This town is home to the world’s largest arch constructed entirely of elk antlers.

A majestic hotel that also stands as a historic relic.