A quirky old tree covered in tokens, cans, and bottles of wishes.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Come for the speed, leave in love with the desert.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This geothermal hot spring hides beneath a slowly growing mineral dome.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

The longest and widest floating bridge in the world.

This Puget Sound military post has a long, turbulent history as a gateway to the Pacific.

Nuclear reactor created the plutonium used on Nagasaki.

This Cold War siren is one off the last of its kind still standing with its immensely powerful original horn.

Keeping Ballard's heritage alive with delicious, lightly battered Alaskan wild cod.

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

The historic bar where local ship captains, traders, and gold miners would come together to do business a century ago.

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

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.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.