Build a massive 170x170 open-air pr...

Build a massive 170x170 open-air prison hub. Prioritize width, depth, and heavy structure. Make the left and right cell blocks very thick and deep, not thin. Wide low-rise prison galleries, 2 floors, big pillars, deep walkways, clear north and south gate openings, huge open center. Cyan 1 and gold halo fully in the floor, not raised. Bright at night. Premium modern prison. No skulls, no fountains, no side wings.