Comment Actually several candidates for "Tauredunum" (Score 5, Informative) 41
In this year, the enormous mountain of Tauredunum in the territory of the Valais, collapsed so suddenly that it engulfed the neighboring fortress as well as the villages and all the inhabitants thereof. The lake was so engorged that along the length of 60 miles and width of 20 miles on both sides of the river there was great loss of life in the ancient towns, both of man and beast. It destroyed also many sanctuaries with the people and violently destroyed the bridge in Geneva, the mills and even penetrated into the city where many people died
(Quick translation from P.C. Basilii anno XXII. Ind. XI) What the mountain 'Tauredunum' corresponds too in modern geographical terms is somewhat disputed.