An art deco ice cream shop covered in vintage train station tiles.

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

An icy lake tucked among jaw-dropping alpine panoramas.

A local scoured more than 1,000 acres for stone to create his masterpiece.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Local lore holds that Butch Cassidy took an escape route through Red Canyon's sandstone hoodoos after an attempted murder.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

European castle ruins in an American state park are actually the product of death and grief.

Massive still life just off the highway in Kansas.

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

An abandoned stretch of highway, deteriorating next to the operational one.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

The longest navigable underground river in the United States is home to countless blind and albino animals.

The largest earthwork effigy in the world.

A castle built by an eccentric medieval enthusiast in rural Ohio.

An abandoned relic of the city's failed experiment with below ground transit.