Use this link http://www.hel.fi/wps/portal/Ymparistokeskus/Artikkeli?WCM_GLOBAL_CONTEXT=/Ymk/fi/Ymp_rist_n+tila/Luonto/Luonnonsuojelu/Luonnonmuistomerkit then the 1st, 2nd, 4th and 5th links relate to Hiidenkirnu.
Something is not right. This message is just to keep things from messing up down the road