Professor Michael Fuller photographed a petroglyph covered boulder from the site of Kilwarden that is displayed in the National Museum of Ireland in Dublin.
Overview of the boulder. The museum display sign estimates the age of these petroglyphs between 2500 - 1700 BC.
Petroglyph. Scale is 10 cm.
Petroglyphs.
Petroglyphs.
Petroglyphs.
Petroglyphs.
Museum sign.