Dig for your own trilobites in this goldmine of invertebrates.

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

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

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

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

A house carved into a rock in the 1940s.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This geothermal hot spring hides beneath a slowly growing mineral dome.

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 cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Read a book next to a Midtown waterfall.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

An inconspicuous footbridge beloved by San Diego locals.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

A meditative space out of a fantasy story.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.