Oddly it involves neither writing letters or prancing around in satin shorts hitting someone!
It is the most beautiful combination of treasure-hunting, hiking, and stamps.
A great hobby for men, women and kids! It gets you out of the house into nature and challenges your mind with clues!
Here's how it works. You get a book (a log book, if you will) and a stamp (lots of people hand carve original designs, lots don't!) and an inkpad. You look on line at Atlas Quest or Letterboxing North America and find clues to a box in your area.
Finally you pack the same gear you would for a walk or hike, (water bottle, sunscreen, etc.) and you set forth. Once you find the box (sometimes as small as a film canister!) you take the stamp from inside the box and stamp your logbook with it - then you use your stamp to stamp the log book in the box!
Always leave the nature around you the same or better as you found it. Use stealth so no one sees you find your treasure.... and always, always make sure to re-hide the box as well or better as you found it.
I promise once you start this hobby you will quickly be addicted!
If you want more info check out this article published in The Smithsonian in 1998 - this article is widely credited for the popularity of Letterboxing in the US today.
Even in our little 'middle of nowhere' town in Central Texas there are several boxes to find!