About Letterboxing [ Teens/Mature Teens ] - Learn about getting started in this hobby and its history. Includes FAQs, message boards and search clues.
Dutch Letterbox Site [ Kids/Teens ] - Provides information on getting started, codes of conduct, prehistoric Dartmoor and the 100 club.
Have Feet Will Travel [ Teens/Mature Teens ] - An introduction and guidelines to finding letterboxes on Dartmoor. Includes details of National Park by-laws and contact details for checking military activity.
Letterboxing Kids [ Kids ] - Includes a map-reading game, photo album, story and instructions for making rubber stamps.
Letterboxing North America [ Teens/Mature Teens ] - Includes a FAQ, links, glossary, and clues for letterboxes all over the United States.
Silent Doug's Letterboxing Site [ Teens/Mature Teens ] - Articles including getting started, outdoor ethics, a glossary, and an explanation of cryptic letterboxer codes. Also includes a list of boxes found and clues for boxes placed. Most clues are for boxes in the northeastern region of the United States.