The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

A beautiful geyser under environmental threat.

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

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This rustic old building is said to be the most photographed barn in America.

This mining town boomed in the Atomic Age when uranium was gold, only to be abandoned when the industry collapsed.

Birds with backpacks expedite film development for a rafting company on a remote Colorado river.

This stone marker honors the man who released Canada goose goslings in Fort Collins, Colorado.

After being lost for nearly a century, this historic bell finally returned home after its mysterious theft.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

Leave a button on the jacket of this iconic Seattle clown.

A giant Troll lurks under one of Seattle's oldest bridges.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

This former coal gasification plant found a curious second life as a popular public park.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

What's that on the side of that building? Va Va Voom, it's Bettie!

This gold-winged spire celebrates the first true flight around the world.

This quiet neighborhood is also home to a 700-ton rock transported by the last Ice Age.

The longest and widest floating bridge in the world.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.