4. Devil's Den, Williston - This underground swimming hole in Williston (near Gainesville), is a rare natural wonder that will blow you away (if you know at least the basics of diving). It's only open for scuba diving or snorkeling, no sightseeing tours, unfortunately.
10 Natural Wonders in Iceland That Will Take Your Breath Away
The Nordic island of Iceland has become an incredibly popular place to travel in recent years. If you haven't gotten a chance to visit the country's spectacular nature, now is the time. Check out the country's awe-inspiring locations.