These eerie outliers of the lightning bug family glow a mysterious blue color.

Below this enormous headstone lie Billy and Benny McCrary, better known as the "McGuire Twins."

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

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

A mountaintop space observatory that is certified dark.

An idyllic mineral hot springs facility with a more-than checkered past.

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

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

Hidden amid a collection of trails is the site of a tragic crash.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

Step back in time on this preserved 1800s farm.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

An abandoned town is hidden in Great Smoky Mountains National Park.

The art studio of an early 20th-century painter, hidden amid the Great Smoky Mountains.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

Mile-long cave system near Great Smoky Mountains.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.