Abandoned Mines are a great monument for your map, has good detail and several ground levels. The size is comparable to Train Yard
 

Features

Prefab Count – 3400
Size – About like TrainYard

Loot:
Crate Normal 2 – 23 crate
Crate Normal  – 2 crate
Elite Crate – 1 crate
Barrels – 58 barrel

Modifications:

Splat Mask
Height Mask
Topology Mask
Biom Mask