The submission window will remain open for 21 days (so until December 27th!), at which point this thread will be closed and three maps will be chosen by DrFuji and myself. These maps will be posted in a judging thread where there will be a poll to vote for your favourite map.
The winner will receive an emblem. To be 100% honest, though, they haven't been made yet, so sit tight, and we'll get to you! ;)
Create a map of a cave.