An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

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

This ambitious attraction was the brain child of a lake resort impresario, and built by the WPA.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.

Home to the deepest rift anywhere on Earth.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

Stairs often replace streets on the steep slopes of this old mining town.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

An extravagant western hotel where every floor is the "ground floor."

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

The hundreds of movies and television shows shot in this high desert town are commemorated in a unique museum.

The ghost town that ended up on Ebay.

At 216 feet in length, this ornamental allium string is a feat to behold.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.