At Eräpyhä, Eräjärvi Orivesi. This structure is about 3000 years old, and the theory is that hunter-gatherers of the era used it as a ceremonial site to ask the spirits for good luck in fishing and hunting. There was a local legend saying that hidden under the heap there is a treasure, and around 1860 they took it apart but found nothing. A hundred years later, in 1960's voluntary workers put it back together; so at this point it is hard to say if the arrangement is the same as it was in the ancient times, or how much it got altered in the process. Well, but in any case the location is atmospheric.