A remarkable geological formation resembling a forest made of stone.

Largest man-made excavation on earth!

Whimsical cookie-themed plaques mark the birthplace of the Fig Newton.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

When ecosystems collide in the arid Southwest.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Odd outsider art installations surround a Gold Rush-era ghost town.

The most magnificent bottle house in a town strangely full of them.

This small town was built around a marble quarry and named after one of the most famous sources of marble in the world.

This black shoreline is made up of exploded lava particles.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

This bridge was constructed from the rubble of the infamous Bastille.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.