The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

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

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

This unique art installation used boiler tubes from a decommissioned power plant to resemble Antelope Canyon.

These mid-century motels once housed the workers who built the Glen Canyon Dam.

Archaeologists believe this panel of petroglyphs depicting descending sheep and other figures in Glen Canyon are 3,000 to 6,000 years old.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

The first motion picture theater in southern Utah, reimagined and renovated as an arts hub.

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

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A hotel with a rich Wild West history of miners and bootleggers.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

This restored opera house is named after a soprano known for tragic romance, exile, and a truly uncomfortable wedding.

An eerie illusion of a nun is said to haunt this cathedral’s Baroque-style bell tower.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

The drama of nature in full effect in this Nevada State Park.

A spiritual vortex among the red rocks in Sedona.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Although it also features red, orange, and variegated cliffs of Navajo Sandstone, this state park is often overshadowed by its more famous neighbor.