Letterboxing is similar to geocaching, but its origins date back to the 19th century. Instead of GPS coordinates, finders use maps or directions to locate the hidden containers. It grew in popularity with the advent of the Internet, and Geocaching's parent company made a failed bid to become the official home for letterboxing. The aftermath of that, however, left us with letterbox hybrid caches, which combine elements of both types of location games.
I was driving around one morning and decided to hunt for a letterbox that had been on my "To Do List" for a while. The description contained a map:
I am not as enamored with the "puzzle" aspect of geocaching as others are, so I don't think I'll be doing many more letterboxes, unless I find some that are relatively straightforward.
There are some milestones I passed which didn't seem to merit their own posts, but I thought I'd capture here.