Geocaching

Letterbox Hybrids
This cache type pays homage to an older form of scavenger hunt. A Letterbox Hybrid must include significant GPS usage for at least part of the hunt. Letterbox-style clues may be used to guide seekers to the container, but only if the clues are accompanied by coordinates specific to the hide. The container for a Letterbox Hybrid must include a stamp, which stays with the geocache and may be used by letter-boxers to stamp their personal letter-boxing book. The cache can be logged without using the stamp.