This map is called "Sand Castle" Which is a Sky castle only better and on Sandbox. Why is it better you ask well it's better because this has all the feautures Sky castle has only extras. The extras include a secret room,soccer field, golf course, and elevator. This map is meant to be played with big parties 8-16 players, the gametype for this map is "Fat Kid."Creator of map:n00b owner7.This post has newer screen shots of other places than the first.This is one of the best Sky Castles I've seen because the others are plain and boring but mine has extras other than the castle its self. I made a Sky Castle on Avalanche whichI will be posting later.

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Front View

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Elevater (Back View)

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Soccer field (Left Side View)

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Human Spawn

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Zombie Spawn

http://haloscreenshots.net/gallery/D7060F484F3CA6F0AC4EE13FB25BABD5/
After Going Through The Teleporter The Zombies Come Out Here And Get On A Vehicle

http://haloscreenshots.net/gallery/E48B2071B82F2ACB2B6434210E04B3BD/
Lift to get in castle

http://haloscreenshots.net/gallery/D77AA5F5F3E0C3E3B348A9E89D8E1DFC/
Elevator

http://haloscreenshots.net/gallery/EC18552EF7A931726CF135192247B63A/
Secret Room (You Have To Crouch Jump Over The 3/4 wall)

http://haloscreenshots.net/gallery/19874637A8214E47F2327357EBB90134/
Golf Course

http://haloscreenshots.net/gallery/C96D024FE2AD5298C158308D495311F6/
One of the rooms

http://haloscreenshots.net/gallery/4FBEB091FBEA407753CC90A4546A2C2B/
Weapon room

ACTION SHOTS...
http://haloscreenshots.net/gallery/4498E28E251C6260E93112A586452F61/

download the map here...Bungie.net : Halo 3 File Details