The mutant mouth of the Muíños, a river that eats dunes in southern Galicia: https://www.outono.net/elentir/2025/02/06/the-mutant-mouth-of-the-muinos-a-river-that-eats-dunes-in-southern-galicia/ A place rich in fauna and which has an observatory for bird watching. You can see it if you go to Nigrán (Pontevedra, Spain).