We went Geocaching for the first time today. Sarah's had a GPS unit for over a year and we've always planned on using it to go. (She won it during a review quiz on a field trip. It pays to pay attention!)
I went online today and not only discovered a fun site that listed several hundred thousand caches, I found there were two within walking distance of our house. www.geocaching.com will even download the coordinates directly to Sarah's Garmin GPS.
I've already downloaded 11 more cache sites in the area and that will be our Labor Day activity with the kids. I'm excited about it.
I think this time I'll remember to take the camera.