The world's largest sticker ball weighs in at a mighty 231 pounds.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

Largest man-made excavation on earth!

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

Come for the speed, leave in love with the desert.

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.

This eclectic collection documents the wild legacies of "America's Wickedest Street."

This Chinese-style quartz sundial was saved in its final hour.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

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

The largest self-built castle in the U.S., six decades in the making.

The 55-pound trichobezoar was removed from the stomach of a cow.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

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

Happen to come across a dead eagle? Send it to America's official dead eagle warehouse.

Over 1.3 million confiscated wildlife products fill this macabre menagerie of illegal animal specimens.