If you're not familiar with geocaching, it's like a scavenger hunt using a GPS that millions of people are participating in worldwide!
This may require some hiking, digging, and driving. Work together to discover the GPS and then find a great place to hide it yourselves for the next explorer :)
All you need is a membership to Geocaching.com, a GPS-enabled device and some creativity and the two of you can head out on your adventure! For more information head to: geocaching.com