You folks need to try a favorite of mine — it’s called “geocaching.” Basically a high-tech Easter egg hunt, looking for hidden containers. You put them back where you found them so the next person can find it.
Look up http://www.geocaching.com — it’s free to play, free to sign up, but it’s far, far easier if you just download the app on your smartphone and use the built-in GPS.
It’ll take you places (some in your own backyard) that you never knew existed.