▁Cal ais , ▁Maine ▁Round house , ▁Derby , ▁Maine ▁Bang or ▁and ▁A ro ost ook ▁Rail road ▁round house , ▁Car ib ou , ▁Maine ▁Grand ▁Tr unk ▁Railway ▁round house , ▁East ▁De ering , ▁Maine ▁Bang or ▁and ▁A ro ost ook ▁Rail road ▁round house , ▁Mill in ocket , ▁Maine ▁Round house , ▁Northern ▁Maine ▁J unction , ▁Maine ▁Sand y ▁River ▁and ▁Range ley ▁L akes ▁Rail road ▁round house , ▁Phill ips , ▁Maine ▁Rock land ▁Tur nt able ▁and ▁Engine ▁House , ▁a ▁round house ▁of ▁the ▁Maine ▁Central ▁Rail road ▁Company , ▁Rock land , ▁ME , ▁NR HP - list ed ▁Maine ▁Central ▁Rail road ▁Company ▁round house , ▁Rum ford , ▁Maine ▁Round house ▁ru ins ▁at ▁Con way ▁J unction ▁Rail road ▁Tur nt able ▁Site , ▁South ▁Ber wick , ▁ME , ▁NR HP - list ed ▁Maine ▁Central ▁Rail road ▁Company ▁round house , ▁Water ville , ▁Maine ▁ ▁Maryland ▁M t ▁Cla re ▁Round house , ▁Baltimore , ▁Maryland , ▁which ▁contains ▁the ▁B & O ▁Rail road ▁Museum ▁Baltimore ▁and ▁Ohio ▁Rail road ▁C umber land ▁Round house , ▁C umber land , ▁Maryland , ▁still ▁in ▁use ▁by ▁CS X ▁as ▁a ▁locomot ive ▁shop ▁Maryland ▁and ▁pen nsylvan ia ▁round house , ▁E ▁of ▁Dru id ▁Lake , ▁Baltimore , ▁MD ▁ ▁Massachusetts ▁Round house , ▁Ath ol , ▁Massachusetts ▁Round house , ▁Hy ann is , ▁Massachusetts ▁Round house , ▁E . ▁De