The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

An acoustic anomaly with a mysterious cause.

A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A museum has some wedding cake dating to the Teddy Roosevelt administration, and some bacon from FDR's.

This giant ice cream cone is the last remaining icon of a Salt Lake City staple.

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

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 immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A reproduction of earth's many biomes.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

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

On Japan's Tashirojima Island, cats are king.

An exquisite tunnel of cascading flowers.

A magical place that lets you play in and explore the world of Studio Ghibli.

An inconspicuous footbridge beloved by San Diego locals.

A couple turned their front yard into an artistic masterpiece.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

This historic hub for labor unions has survived the city's changing landscape.