This playground sculpture of an icon from the past is dedicated to the children of the future.

The only road through the heart of Glacier National Park.

These giant metal horses graze on a hilltop near the Montana highway.

A house built from trash known as the poor man's Hearst Castle.

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

This giant slab of driftwood marks the beginning of the Winnemucca to the Sea Highway.

The arch that celebrated the completion of the Lincoln and Victory highways.

This beloved roadside attraction welcomes visitors with his signature neon smile.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

A giant open-air sculpture made of over 200 full-sized boats.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

An architect's childhood fantasy treehouse made real.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Along a California highway is a kind of Jurassic Park made of metal.

The site of Paul Revere's historic two lantern warning.

This super steep hike ascends 2,000 feet in less than a mile.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The walls of the iconic dome are hollow and have a secret stairway.