[NEW] Cross over a massive river

Somewhere in europe where this river once was land when the ocean levels where very low at the time people could walk where this river lies. But IOO Years later when sea levels rise. The land flooded the river formed. People used boats on the rough water. Many many decades later a bridge was build but an link was missing. Get over the river to a larger land mass there! If you have the chance you can dive under the water and maybe find Human bones that are down there left from the period when this river was land!