A replica that won't float away.

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

Dig for your own trilobites in this goldmine of invertebrates.

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 final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

A replica of the flagpole that gave a frontier town its name.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A huge musical instrument played by the ocean.

An exquisite grouping of structures made from 10 tons of invasive saplings.

This massive oak tree has ties to the first native tribes of the region and the founders of Texas.

A tribute to the "toughest woman on the Texas frontier," who survived a famous battle and five husbands.

Now abandoned, this East Austin school for the disabled began as the "State Colony for the Feeble-minded."