Enormous lake at the bottom of a unique cave system.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

"May the force be with you always."

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

This plaque marks the site where the penultimate chapter in the journey of two doomed boys unfolded in an imagined parallel universe.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

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

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

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

A ghost town that held steady longer than most, but finally gave up the ghost.

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

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

Pyramid home to an obscure religious group that practices modern mummification.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

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

A Mars simulation in the southern Utah desert.

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

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

Largest collection of mounted dinosaur specimens in the world.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A small flooded ghost town with a few scattered structures remaining.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."