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

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

Largest man-made excavation on earth!

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

This quiet park's strange sedimentary spires were named after Kodak's color film.

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

A replica that won't float away.

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.

Boise State's stadium was the first non-green football field in the world.

Jail from the 19th century that was built by inmates.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

Home to the deepest rift anywhere on Earth.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.