The Longpool Falls Recreation Area northwest of Dover is well-known for its camping and swimming opportunities - but not too many folks are aware of the falls behind the camping area - until now. It's not quite the Caribbean coral reef, but the rock reefs in one of the clearest lakes in the country - Lake Ouachita - make for quite a snorkeling outing at Crawdad Island. The Nars and Skull Bluff along the middle portion of the Buffalo National River are two very unusual rock formations which are explored in the closing segment.