 Surviving structures include four officers ' barracks , one <unk> 's barracks , two infantry barracks , a hospital , <unk> , <unk> <unk> , ordnance and post headquarters , <unk> <unk> , <unk> shop , flagpole , and magazine . Another feature of the park is 5 acres ( 2 @.@ 0 ha ) of <unk> prairie restored as part of an ecology @-@ restoration project . 
