I was flitting around here and there and came across this fun little activity:
A treasure hunt that can be done whatever your city and/or if you travel.
It’s called Geocaching. It’s a high-tech treasure hunting game played throughout the world by adventure seekers equipped with GPS devices. The basic idea is to locate hidden containers, called geocaches, outdoors and then share your experiences online.
Kind of a nifty little game to get you (more or less) outdoors.