Here is a modern city i put a few months work into.
The city has over 200 houses and buildings.
Its not fully finished but i dont know if i ever will get it done there is so much work.
This also has the modern office building concept (is not in the pmc download).
all you need in survival mode.
house has:mob grinder with items sorter,auto brewers,cobble gen,three 3x3 pistion doors,lava drawbrige,saft room,semi auto farm,auto flower farm,elervator,beacons on/off and more.
long winding tunnel with lots of traps. 3 rooms scatterd though the tunnel that have zombie attacks.ive made some arrow cannons in 2 rooms and the last zombie room has a repearing floor and tnt cannons,splash poison cannons,arrow cannons,slow cannons and 5 dispensers with 30 zombies in each.its going to get a bit epic
play on servival mode and easy,normal or hard but not peacful or this wont work
creeper = blow up my redstone traps.dam creepers not good for this type of build