A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

A contemporary fresco movement illustrates the region's rich history.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Largest man-made excavation on earth!

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

What is the Thing?

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

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

The fossilized remains of ancient California redwoods.

A trash dump made beautiful by nature's power.

Legends surround this jagged rock formation in the New Mexico desert.

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

Raised illegally, Reggie now lives at the Los Angeles Zoo after authorities spent years tracking him down.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

A hand-built folk art installation covered with messages of God's love.

This impressive Boston holy house is the American mecca for Christian scientists.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.