By Chris Hinton, from Wired
It's no hardship to go out for a walk with the family: a nice wander around the local cycle path, loch or tourist attractions is a great way to spend together. Do you play games when you go out for a walk, though? I guess I Spy is one of the favourites, but we often do something else: we hunt for geocaches.
Geocaching is essentially high-tech treasure hunting. Small "caches" are hidden and their GPS coordinates posted on the Geocaching web site. To find the cach...