Lake Lappajärvi, one of Finlands three known meteor craters (75 miilion years old), was originally thought to be remains of an extinct volcano. Local popular rock festival is still called Volcano Rock.
Lake Lappajärvi, one of Finlands three known meteor craters (75 miilion years old), was originally thought to be remains of an extinct volcano. Local popular rock festival is still called Volcano Rock.
Craters 
