A free, canine-friendly alternative watering hole near the more famous Barton Springs.

A grove of colossal man-made flowers built to collect the sun's rays.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This vast kitty-themed collection illustrates the history of human-cat interaction.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

Ruins of an American Civil War iron forge still survive today.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

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

This bridge is haunted by the ghost of a distraught mother.

This woodland architectural installation acts as a camera obscura for the heavens.