Venture into the depths of the world's longest known cave system...and then venture above ground to one of the delightful campgrounds located near Mammoth Cave National Park. Mammoth Cave is a popular destination, attracting over 650,000 visitors per year. If you're planning to visit with your RV in tow, you'll find several campgrounds located in and near Mammoth Cave NP, and we're going to tell you about three top picks.