I once landed, at night, at a large airport, on the taxiway.
It was after the tower closed for the night, and the runway lights were not responding to the usual 7-clicks on the CTAF.
Not a river, for sure, but certainly personally very memorable.
My former boss took off in a fog. He was on the taxiway by mistake. As he was accelerating, he saw a fuel truck in front of him. He pulled back on the yoke hard and cleared the truck by about 20 feet.
I was in multiable water landings