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.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Dig for your own trilobites in this goldmine of invertebrates.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A big museum full of little worlds.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

This otherworldly church spire reaches up toward the heavens.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

Over 600 vacuum cleaners stack the shelves of what may be the cleanest museum in America.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

This historic cliffside mansion uses a natural cave for air conditioning.

This abandoned prison castle has become an imposing gallery of graffiti art.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.