Tennessee summers are for exploring the Great Smoky Mountains and finding new trails to get your adventure on. There are plenty of creeks, lakes, and waterfalls that you can find to cool down in on a hot and humid day, even if it's just for a few hours. What some might not know is that there are a number of crystal clear pools on some hiking trails that will rock your world. All you need is a bathing suit, maybe a few friends, and some sunscreen before you take a dive into one of these swimming holes in Tennessee.