Get a Clue

Different regions vary as to where letterbox planters put their clues. The two largest websites are listed below, and many boxes are listed on both (so you can log them on both).

There are also other websites, secret groups and even "word-of-mouth" clues, which must be given to you by another person. A "cuckoo clue" is a clue that you find in one letterbox and you may move it to another letterbox when you are finished with it.

AtlasQuest

Letterboxing North America

You can search by location, box name, planter and many other variables.