This is a CTF map with a slight twist.
The entire map is intended to be a nobuild map, so you will only be able to place weapons, and not building blocks.
There are 4 towers in each castle, and when a flag is captured from a tower and taken back to the pole in the central building underneath the spawns.
The 4 towers are accessible from the main wall of the castle. The shorter flag towers have spiral staircases.
How do you get onto the walls if you can't pillar up to them? I hear you ask.
There are 2 staircases in the castle courtyard, but to get to those, you need to go through a gate which closes on demand killing anyone trapped in the tunnel.
Unlike the current CTF maps, part of this map is destroyable, the stillwater, dirt and grass can all be destroyed, leaving a contoured solid map. (If this doesn't work well after testing, it'd be easy enough to change).
The map can be found on /l alkatraz2 on TNT Wars.
All images can be found here