It's beginning to look a lot like... summer! And Tennessee is full of swimming holes, lakes, waterfalls and rivers perfect for cooling off. Once the weather warms, there's nothing quite like taking a dip into refreshing water surrounded by gorgeous scenery. There are more than 840 waterfalls across the Volunteer State, or if you're looking for another way to cool down, check out more than 10,000 caves. Here are some swimming holes you can't miss this summer: Cummins Falls - Jackson County.