What's Letterboxing?

I mentioned last time that I had gone letterboxing this past weekend in Waco. The definition at www.letterboxing.org is "LETTERBOXING is an intriguing pastime combining navigational skills and rubber stamp artistry in a charming "treasure hunt" style outdoor quest."

There is also a variation called geocaching (which is more high-tech and involves GPS.) Seems there are a lot more geocaches out there than letter boxes, but I don't feel running out and buying the equipment yet.

This is the one I found this weekend. It was pretty easy.

The boys and I have been out twice, trying to find this one, which is supposed to be "easy." Oh well. Maybe three times is the charm?