A clear blue swimming hole with hidden caves, still unexplored.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This former Texas landfill is flush with 300 million-year-old fossils, all fit for the taking.

A health museum containing a 27’’½-foot intestine.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Mysterious glowing orbs float through the desert night.

Fantastic collection celebrating the final send-off.

A popular swimming hole that hides one of America's most deadly diving spots.

One part antique store, one part curiosities hodge-podge.

A modernist landscape of water and sci-fi concrete.

Continuing the tradition of the dime museum in style.

An emerald-green grotto just a short trip from Austin.