On the Oregon coast is a natural hole that seems to be draining the sea.

Only known mainland rookery of the threatened Stellar sea lion.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This natural marble cave is one of only five national monuments in Oregon.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This roadside stop between Goblin Valley and the Henry Mountains is the perfect location to view some of the region's natural wonders.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

This historic national park is covered in the stunning ruins of red rock pueblos.

Oddly shaped rock formation, misassociated with a nearby utopian community.

A house carved into a rock in the 1940s.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

Once one of the largest producers of pig iron in the world.

The world's longest known cave system.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

An experimental, automotive replica of Stonehenge.

America's largest man-made forest was planted in an effort to bring back the past.

The world's last remaining store of its kind.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Largest man-made excavation on earth!