A house carved into a rock in the 1940s.

Hunting trophies decorate Oregon's most unique bar-restaurant.

The wooden airship was the largest flying boat ever built.

Home of Howard Hughes' Spruce Goose.

Home to the only outdoor municipal elevator in the United States.

Post office plaque commemorates local resistance to a cult invasion.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

The World's Largest Bull.

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

An entire town preserved as a historic landmark.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

Four hundred granite steps were built into this massive rock by the National Park Service.

Belly up to the bar in Cowtown, don't forget to buy some boots.

An eclectic assortment of medieval architecture in a small Iowa town.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

The world-record holder for the longest bridge stretching continuously over water.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

The world's last remaining store of its kind.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.