This map is a small city-scape type of map with bigteam play in mind. There are many of little details that assist gameplay from the three story main building to the 2-floor parkade with drainage tunnel. The map is VERY asymetrical, but fair to both sides.
*Edit* I guess I can add a few more details. The teleport takes you to the top of the base (to add access), but is a one-way teleporter. The map is also setup in such a manner that its easy to GET to the defensive building (from the attackers start), but limited access to return home with your prize. Alot of people have said they enjoyed this map, I hope some of you give it a try.

Gameplay rocks on 4v4 snipers and bigteam (6-8/team) one bomb/flag. It is also set-up for vip, but never tested on that setting. The Gophers have been helping me test this map for the past few days and many improvements have already been made. Hope you like it!
YouTube - Park it flythrough
Weapons:
Battle rifle x4
Carbine x1
Needler x1
Rocket x1
Plasmas & frags
Shotgun x 1
Sniper x 1
Bruteshot x 1
All above are available on each side for each team
Smg x 1
Plasma Rifle x 1
Spiker x 2
Battle rifle x 2
All above are found elsewhere in the map
Gauss Warthog x 1 (Defensive)
Mongoose x 2 (Parkade)
Mongoose x 1 (Defensive)
Warthog x 1 (Parkade)
Ghost x 1 (Parkade)

Download here: Bungie.net : Halo 3 File Details

My ms paint overview
Building 1 - Defensive building
Building 2 - Building #2
Building 3 - Parkade
Building 4 - Attackers outpost
Building 5 - Warehouse (under construction)
Building 6 - Hut
Building 7 - Shack

Actual Overview (couldn't fit entire map in pic.... Crypt ceiling stops that)

Front floor1 door of Defensive building

Bridge enterance floor2 of Defensive building

Alley behind Defensive building and rear floor1 enterance

Rooftop of the Defensive building
(Attackers can access roof by sender teleport in other corner, shown in pic)

The building connected to the Defensive building by the bridge

The Parkade Top floor overview

The Parkade lower floor

The storm-drainage enterance located in the lower Parkade

Other side of the drainage tunnel & the back alley

Attackers outpost

Warehouse (under construction)

The hut (used as cover and as a jumping point to the teleporter)

The shack in front of the attackers outpost (used as cover and houses the defensive rocket)