Tech Center.
Created by me in 2002 for RADEN.com, became one of "Lion's Picks," or best maps on the site.
4-way map with each player protected by occupiable walls and tech buildings at their base to capture.
In the center is where the real goodies. This map was modified to allow certain defensive statues to be capturable.
You'll just have to venture into the middle to see what I mean.
tech center.map