LOL Funny thing is that the prevailing winds mean the Michigan shore usually catches greater waves. I sat in a parking lot in Ludington Michigan one day and watched the lighthouse get pounded with waves like this. (not my photo)
Which it didn't but that's because they already knew back in the DeSoto's day that this could happen on that lake so NOBODY built really close to the shoreline ~ plus the lake used to have an uncontrolled height above sealevel and could change over night.
I'd guess Geneva was quite small when this 24 foot tsunami took it out!
Roman Geneva was originally founded as a border town to protect Gaul against the Helvetii. After the fall of the Empire it was absorbed into the Burgundian kingdom.