I remember walking on a grass path surrounded in bushes to reach a geocache that was at the edge of some body of water, maybe a lake or a swamp. There was a stack of forms meant to give us a puzzle to solve before we can log our visit on this geocache, but I did not understand that I had to fill out anything on it. I just grabbed one, and me and whoever were accompanying me entered a garden on the left, still surrounded by the same tall bushes. A geocaching event was being held in that garden. There was a man sitting at a table, waiting. I went to see him and gave him the empty form. He asked me for the answers to the puzzle, but I of course did not have them and only then realized what the form was for.