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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

In the heart of Brigham Young's promised land sits a festering plot of industrial ruin that has been claimed by society's outcasts.

This Moab institution functions as both a rock store and a small natural history museum.

This large, castle-like structure is hidden amid the mountains on the grounds of the Utah State Hospital.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

An empty mine that some believe will suddenly be filled with fortune and treasures at the end of the world.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.

Step into the cool deep past and unknown future of who begat who.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

A proto micro-nation sometimes populated by artists, surrounded on all sides by a Utah most barren.

A dazzling display of red rocks weathered into spires and hoodoos.

Oddly shaped rock formation, misassociated with a nearby utopian community.

Visitors to this library are in for a real-world education in modernist architecture.

A small oasis not far from downtown Moab.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

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.

This ghost town was once a cult-like religious utopian settlement.

The largest island on the great salt lake is home to curious creatures and strange stories.

Despite its name, this route in southern Utah offers a heavenly day trip.

The fifth-longest natural arch in the world, and the longest outside China.

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