http://letterboxing.org/ We have NOT been able to find this letterbox for over a year but we keep getting emails that it is being found. Finally we found it! well some kind soul has spruced it up with a new book and stamp. :) It also had two hitchhikers in it. I plan on replacing a missing one of ours that is close driving distance to us and putting the hitchhikers in it.
Hmmm. Makes me think I need to see if some homeschool friends would like to join this neglected hobby of ours.