One of the city's more unique attractions, the 100-acre Louisville Mega Cavern, which was created out of a 19th-century limestone quarry, now houses the world's only underground zip line course.

Don't miss your chance to experience the only underground Christmas light show in the world. Lights Under Louisville, located in the Louisville Mega Cavern, is a magical drive-through holiday ...

LOUISVILLE, Ky. (WAVE) - Seven million lights are used for the Christmas Displays in the Louisville Mega Cavern’s Lights Under Louisville attraction. WAVE Photojournalist Michael Flynn drives ...

DEEP INSIDE, HUMPBACK MOUNTAIN IS A PLACE UNIQUE IN NORTH CAROLINA. THE LINVILLE CAVERNS ARE THE ONLY CAVES IN THE STATE OPEN TO THE PUBLIC FOR TOURS. FOLLOWING HURRICANE HELENE, BEING OPEN TO ...

Under a swath of Kentucky hills and hollows is a limestone labyrinth that became the heartland of a national park. The surface of Mammoth Cave National Park encompasses about 80 square miles.