Bronze-age grave in Helsinki. You may not use this photo for commercial purposes. © Photo: Helsinki Art Museum Pronssikautinen hauta / Bronze-age grave Artist Tuntematon/Okänd/Unknown Kalkkipaadenpuisto, Lehtisaari, Helsinki The natural-stone burrow located in the Kalkkipaadenpuisto park is a bronze-age grave some 3000 years old. The grave has been exacavated. The monument is protected, and a plaque has been installed nearby, explaining the burrow’s history in Finnish and Swedish. Read more.. At map