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

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

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A house carved into a rock in the 1940s.

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 largest outdoor art gallery in the Northwest United States.