https://www.visitfinland.com/es/producto/4739e989-52d8-4826-be29-dbf3bc6908cd/old-passage-of-the-imatrankoski-rapids-and-kruunupuisto-park-potholes/
Imatrankoski rapids was formed about 5,700 years ago, when flowing waters of River Vuoksi eroded a channel into the fractured bedrock. It is said to be...
oldpassageimatrankoskirapidspark