glendalough round tower ireland

abbey ancient architecture autumn background beautiful bell building celt celtic cemetery century chapel christian christianity church churchyard countryside county cross culture europe forest glendalough gothic grass grave graves graveyard green headstone heritage historic historical history ireland irish landmark landmarks landscape medieval moment moments monastery monastic mountain mountains national nature old outdoor pilgrimage religion round ruins scenery scenic sightseeing sky stone stones summer sunny tombstone tombstones tourism tower travel trees view vintage wicklow