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

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

These unique volcanic rock formations offer the perfect opportunity to camp and hike.

The final resting place of the most famous outlaw in the Old West.

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.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

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

This is one really big nut.

A museum dedicated to the alleged Roswell Incident.

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

The highest point in Texas is capped by a big silver pyramid.

This abandoned church dominates the landscape of a former mining boomtown.

Some of the Old West's most notorious outlaws frequented this mining town.

The remains of Abó, Gran Quivera, and Qurai are monuments to the long, complicated history of the Indigenous people of the Southwest.

The highest point in Florida is still the lowest high point in the country.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

The highest point in Mississippi is a hilltop that was once used to bombard a nearby town with artillery.

A short boardwalk through a swamp leads to the spot from which the Louisiana Purchase was surveyed.

The seventh largest spring in the world.

People of the Plum Bayou culture built these enormous mounds over 1,000 years ago.

The warmest cave in the Ozarks features two seemingly bottomless lakes.

Learn all about this iconic air rifle without putting an eye out.

Bronze statue marks the spinach capital of the world.

An outsider art studio that created a piece of work so popular they had to turn mainstream.