mapsurfer.com is in a state of flux. The intent is to do something creative here someday, but that could be six days, six months, or six years from now.

If you are looking for a puzzle now, however, aside from the outdoor puzzles represented by the treasureboxes, the sort I like to make are the "Where Are You?" sort as in McBrae's Travelog, which is part of this treasurebox clue, but can be done in the armchair. (You may need to start with the actual background in the clue also, I'm not sure if it is totally standalone for all of them or not).

Also, the Chester County Code is a bit puzzle-like, especially if you like outdoor puzzles.