Letterbox is a fun outdoor activity where participants search for hidden containers, called letterboxes, using clues and maps. Each letterbox typically contains a logbook and a unique stamp. When you find a letterbox, you can sign the logbook and use the stamp to mark your own personal journal or scrapbook. This hobby combines elements of hiking, geocaching, and treasure hunting, making it enjoyable for people of all ages. Many enthusiasts create their own letterboxes, often placing them in beautiful or interesting locations. It's a great way to explore nature while engaging in a playful adventure with family and friends.