The fifth-longest natural arch in the world, and the longest outside China.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

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

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

100-year-old shipwreck you can walk up to at low tide.

The longest continuous lava tube in Oregon.

A little-known hot spring haven right below the highway.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

A massive sea stack famous for its appearance in The Goonies.

Only known mainland rookery of the threatened Stellar sea lion.

The first park built over a freeway is a brutalist masterwork.

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

A popular swimming hole that hides one of America's most deadly diving spots.

A wall of chewing gum moonlights as collective art.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

An extraordinary mixture of natural beauty and man-made phenomena.

Historic funicular railway, believed to be the shortest railroad in the world.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The highest bridge in America was built for an almost unnervingly small amount of money.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.