http://geocaching.com/ Geocaching is the realworld adventure that's happening right now, all around you. Watch this video to learn more about what geocaching is, how it works and how you can become a part of it.
After the video, head over to Geocaching.com to create your free account and to get started. Happy geocaching! http://www.geocaching.com/
Get the app:
https://www.geocaching.com/mobile/