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.

Lights Under Louisville, located in the Louisville Mega Cavern, is a magical drive-through holiday light show situated 100 feet below ground. "Because we are underground we're dark all the time ...

(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 through the ...