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 geothermal hot spring hides beneath a slowly growing mineral dome.

The highest bridge in America was built for an almost unnervingly small amount of money.

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

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

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

A giant donut stands as a popular symbol of Los Angeles iconography.

The largest permanent Monopoly board makes one of the longest games even bigger.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

A one-of-a-kind collection of a unique medium.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

Despite sitting firmly in the global cradle of the Church of Jesus Christ of Latter-day Saints, this Hare Krishna temple is host to one of the largest color festivals outside India.

Are these prehistoric metal pipes evidence of alien plumbers? Nope, but they are amazing nonetheless.

This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.