winter fortress moat and historic windmill in busy bourtange

advent architecture background boertange bourtange bridge busy canal christmas cloudy cold cozy culture drawbridge dutch europe exploration festive fortified fortress frost frosty frozen green gristmill groningen heritage historic history korenmolen landmark landscape lights market medieval moat monument mood nature netherlands outdoor park postmill replica rural scenic seasonal snow snowy standardmolen sunday toilet tourism town traditional travel trees vesting view visitors walk water windmill winter