Dig for your own trilobites in this goldmine of invertebrates.

See massive fossils that are over 200 million years old in northeastern Arizona.

The longest continuous lava tube in Oregon.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Rippling sand dunes frozen in the Arizona rock.

Most-visited and most-photographed slot canyon in the American Southwest.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

Canyon walls shrouded in ferns.

Ancient human, animal, and geometric figures drawn in the earth.

A trash dump made beautiful by nature's power.

Singing sand that stands as the final remains of an ancient lake.

The rusting remains of the largest assembled WWII fleet on the West Coast.

"Only the devil could play golf here."

An extensive collection of ancient Egyptian artifacts and mummies.

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

One of the most unusual geological features, recognizable from a dozen hit movies.

The rocks in this arid basin leave trails of movement behind them.

Towering basalt columns, a creation of fire and ice.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.