Geocaching is an outdoor adventure game for GPS users. Actually, it's the modern version of the Fox Hunt, where people with direction sensitive receivers hunted for hidden little transmitters. These days, caches are set up all over the world, users sharing the locations of these caches on the internet. One such website is Geocaching. Once a cache is found, there could be some sort of reward. When something is taken from a cache, the visitor is asked to leave something else in the cache. On the website, people can report their success, or add new caches. There are also mystery caches. A puzzle or riddle has to be solved to find the cache, or the cache itself contains a puzzle, leading to another cache. On Geocache, you can find two caches, one using my Enigma simulator, and a Canadian one, the first ever to use my M-209 simulator. If you have a GPS, you can join the hunt after creating a free account.