Mammoth Cave National Park

Mammoth Cave National Park preserves the world's longest known cave system, with more than 400 miles explored. But, as a tourist, you can see much better caves than Mammoth Cave so don't go way out of your way to visit. If you do go, you will need a ticket and although reservations are not required, you should probably get them early or you will be stuck in the area awhile. In addition to the many cave tours, you can hike, bike, ride your horse, canoe and kayak, or enjoy a campfire program. With nearly 84 miles of trail in the backcountry, it's a surprising place for backpacking. There are six major trailheads to access these trails. There are also three developed campgrounds in the park with vehicle access.