The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

This giant temperature attraction created some giant electric bills.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

These colossal desert barcodes have been fine-tuning spy satellites for decades.

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

A Wild West saloon that helped define a generation of psychedelic rock.

You might recognize this historic Oregon mansion from its appearance in 'The Goonies.'

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

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

This historic bridge connects Whidbey Island to Fidalgo Island across whirlpool-filled waters.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Legend says one of the world's largest marine geysers is actually a whale that got wedged within the rocks.

This expansive bridge in the Canadian wilderness was originally just built for friends.

A former Catholic seminary, now a Washington State Park, preserves undeveloped lands on Lake Washington and also hosts a luxury hotel.

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

This massive redwood tree has a hole in the base big enough to drive through.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

The longest spit in the United States ends at a lighthouse in the Strait of Juan de Fuca.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

This quiet park's strange sedimentary spires were named after Kodak's color film.

A tunnel with windows, so you don't miss out on the impressive views.

The illuminated falls are a gem in North Cascades National Park.