NATATORIUM is a fancy word for swimming pool, especially an indoor pool. This cache is in that vicinity, in another on the Gurnee Park District series, as approved by the Superintendent of Parks. Parking is immediately close by, and the terrain is not difficult, although the host might be a bit of a pain. FTF will find a nice trinket to pass along, Hopefully others will have as much fun finding these parks caches as we've had in placing them. We have found some interesting little areas we never would have found if not for this terrific hobby.