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 ... costs $114.99. How do I get tickets for Lights Under Louisville and Neon Rush Ziplines?

You can buy tickets or find out more at louisvillemegacavern.com. Guests must be at least 7 years old and weigh between 55 and 285 pounds to do the zip lines. Louisville Mega Cavern also notes ...