Home » Facts Largest Covered Aviaries in the World 2 of the largest covered aviaries in the world and a waterfowl preserve are located at Gooseneck Hill Waterfowl Sanctuary with over 300 geese, ducks and swans even having the endangered NeNe geese. in Birding Scenic Drives & Views Email this page Photos tagged as #EnchantedMountains or #EMFun. @emountains