A rising forward drone shot of The River Shannon backdrop to the Ancient Clonmacnoise Monastery in County Offaly Ireland

clonmacnoice priory river shannon offaly ireland ancient monastry river jetty flooding flood plains crozier round tower high crosses high x buildings 13th century sand banks hd drone scholars early teaching blue sky hedges tourism failte graves walls bog long boats christian grave slabs long boats shannon st ciaran 6th century grave slabs graveslab cross of the scriptures students opw