So I'm visiting my parents this weekend and my Dad recently got a GPS and is into geocaching so we went treasure hunting after lunch.
What you do is look on the website for coordinates and then find them with your GPS. Then you find a container with a log of everyone who has found it, and some treasures.
The idea is to take something out and leave something new, but you can just leave something new. We left one of my Moo cards.
And then continued on our walk. It is a rainy snowy day but pretty. I'm enjoying my hot chocolate now though.