Creating Your Own Geocache
If you've never heard of geocaching, you're in for a treat. Chances are that you have a few geocaches right in your own neighborhood. These mini-treasure boxes can be found with GPS coordinates downloaded from the geocaching website and can be a fun way to get outdoors and try something new. All you need is a GPS - even a capable smartphone will do the trick.
After you've found a few caches, it's a good idea to contribute to the sport by making one of your own. Geoaching.com offers a great tutorial on putting together your first cache and finding a good hiding place for it.