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

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

A sharp bend in a dramatic river canyon cut through red rocks.

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.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

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

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

Not your typical pet cemetery.

Walk through the sets of old western films at this small museum in Utah.

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.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

A surviving concrete arrow from an early-20th-century airmail-navigation network overlooks a reservoir.

Opened in 1911, this small shop is the oldest ongoing establishment in St. George.

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

A monument to a survivor of harsh pioneer life, frostbite, and primitive surgery.

If it wasn’t for an innovative use of quilts during a crisis, the city of Panguitch might not exist today.

The notorious Wild West outlaw was raised in this unassuming abode.

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

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

This outsider art paradise is filled with dinosaur sculptures crafted from recycled machinery.