When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

This naturally-sourced hot spring is now home to a clothing-optional resort.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Site of the greatest known waterfall that ever existed.

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

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

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

An exotic wildlife habitat right off The Strip.

A wall of chewing gum moonlights as collective art.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

A Roman-style column in Oregon hides a spiral staircase inside.

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

Two massive rock outcroppings on the Oregon coastline.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

A heavenly experience, right here on Terra Firma.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

10,000 flowered plants bloom in the City of Roses.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.