The secret city built by the Manhattan Project.

This replica of the Greek structure is in the heart of Nashville.

More than five miles of underground passageways.

Visit this playground of waterfalls, caves and sinkholes.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

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

All that's left of the quintessential "cabin in the woods."

Home of an evil witch famous within southern folklore.

Enormous lake at the bottom of a unique cave system.

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

This multi-story wooden waterpark offers homemade thrills.

Rotting dome home spotted near Chapel Hill, North Carolina.

For more than 150 years, this cemetery has served as the final resting place for many members of Wilmington's Black community.

One of the oldest Black communities in western North Carolina and one of the largest Black Mennonite congregations in the country.

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

In a pedestrian tunnel on North Carolina State’s campus resides an expressive and artistic free-for-all.

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

This colonial cabin is the oldest building in High Point, built by one of the first settlers in the area.

This sinkhole is disguised as a pond and named after the man who stumbled upon it.

Cherokee alphabet, proof of ancient North American Jews, or just a hoax?

A sign marks the plane crash that caused two nuclear bombs to fall in North Carolina.

The scene of the largest surrender of Confederate troops at the end of the American Civil War.

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.