Custom Map PL_island
PL_Island is a payload map by the same creator of CTF_Blimp. It's loosely based upon Tracy Island from Thunderbirds and pulls it off very nicely.
It's a large map that suits 32 players and has some interesting ways around the map to out fox the defending Red team. It's still in beta at the moment but is well worth taking a look at. You can find more information on our forums.
Download from tf2maps.net