an old fortress in europe along which a river flows.

architecture arsenal bassin bassindearsenal bastille boat canal canaldeourcq canalsaintmartin capitale castle center channel city corfu corfuisland corfutown defense europe european europeanunion fortress france french history houseboats iledefrance island martin medieval navigation old outdoor paris parischannel port portdearsenal river riverseine saint saintmartin seine side stmartin tourism town travel urban view waterway