The dinky Blue-Flag Nauthólsvík Geothermal Beach, on the edge of the Atlantic, is packed with happy bathers in summer, thanks to golden sand imported all the way from Morocco and an artificial hot spring that keeps the water at a pleasant 18°C to 20°C. There are sociable hot pots on shore and in the sea, a snack bar, changing rooms (Ikr200), and canoes and rowing boats. Get there on bus 19.