Claim: The Gauldalen River in Trondelag county, Norway, was the site of one of the country's worst natural disasters, a landslide that destroyed more than 25 upstream farms in 1345.
Evidence: Gauldal or Gauldalen (English: Gaula River valley) is a valley and traditional district in Trøndelag county, Norway. In September of 1345, there was a landslide just north of the village of Støren. This newly formed lake flooded and destroyed 25 upstream farms in the narrow valley.