May 15, 2015 2:00 pm Have a Mega Adventure at Louisville Mega Cavern Audrina Patridge explores the 4,000,000 square feet that is Louisville Mega Cavern where BMX biking, a ropes course, and ziplining are all underground. US & World Videos 5:28 Biden condemns antisemitism as attack on democracy during Holocaust remembrance speech 1:20 Would you put pickles in your Dr Pepper? 1:34 Nicole Kidman floored over Olivia Rodrigo's AMC ad tribute 3:45 Gabrielle Union and Dwyane Wade's daughter had cutest reaction to mom's Met Gala dress 1:12 Ariana Grande channels Glinda at 2024 Met Gala