navigable pontcysyllte aqueduct, carries the llangollen canal across the river dee as seen from sandstone bridge

across aqueduct arch arched bicycle bike boat boats bridge britain canal cast connects construction copy countryside dee destination ellesmere flow great height heritage iconic iron landmark landscape llangollen location masonry narrow narrowboat nature navigable navigation network outdoors passage pastures people pontcysyllte remote river site space stone stonework stream structure tops tourism tourist towpath transport travel tree trees vale valley wales water waterway world