Water Tupelo (Nyssa Aquatica) are common in the swampy lowlands of Missouri's Bootheel. They are almost unheard of in the Ozark mountains--almost, but not entirely.
Tupelo Gum Pond and nearby Cupola Pond are geological curiosities. They are located in a region of the Ozarks where a karst topography exists. Water filters through limestone or dolomite creating caverns. When those caverns collapse, a sinkhole is created. Most sinkholes do not hold water, but these two natural areas are exceptions.
Visitors are well advised to take along a map, because the ponds aren't easy to find. Comfortable walking shoes are a good idea too. When you arrive, there won't be any doubt in your mind. Compared to the dry, hardwood forest that will surround you for miles in every direction, the tupelo swamp will be a breathtaking sight.
Make sure the batteries are good in your camera because it'll be a long walk back to your car to get more. And as always, leave nothing behind but footprints.