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

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

The best Tiki bar in Las Vegas.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

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

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

This abandoned bootleg attraction was built to cash in on the popularity of classic TV show, F Troop.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

This historic national park is covered in the stunning ruins of red rock pueblos.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Collection of vintage trailers double as hotel rooms.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A motel dedicated to Southwestern nostalgia.

Limestone caves with spectacular showcase chambers.

A stealthy Apache hideaway that became the haunting site of a mass grave.

A self-built castle made by a mysterious man.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."