Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

A small Wyoming town is home to the state's oldest-operating soda fountain.

Locally known as the "Onion” and the "Egg Beater,” Casper’s most recognizable buildings are beloved local landmarks to many, and eyesores to others.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The crumbling structure is a rare surviving relic of the area's bygone mining industry.

An antique Beechcraft airplane serves as a giant windsock for people driving through the blustery open country of eastern Wyoming.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

This archaeological dig site and museum is home to one of the largest dinosaur fossil collections in the world.

This enormous fish commemorates the unplanned release of brown trout into a Michigan river.

As its grandiose name implies, this wooden dome is unsurpassed in size.

Large one-man sculpture park in Michigan.

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

This hand-carved wooden carousel in the Story City North Park was built in 1913.

America's first National Historic Landmark is a 100-foot tall obelisk and gravesite dedicated to the only casualty of the Lewis & Clark Expedition.

Known as "The Hill of the Little Devils."

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

This sculpture gallery is home to magnificent beasts made of scrap metal and found objects.

An entire city block built completely out of petrified wood.

Before its closure in 2002, this South Dakota mine was the largest and deepest gold mine in Western Hemisphere.

Despite monuments in other locations, this spot in a South Dakota field is recognized by the U.S. National Geodetic Survey as the center of the 50 states.