The thermal spring Chaika, or as it is also called Dobry Klyuch, is located on the East coast of the island of Kunashir. The source comes from the bowels of the earth on the fault line that runs from the Golovnina volcano to the tyatya volcano. A single outlet of hot water with a temperature of 67°C, approximately in the middle between the volcanoes of Mendeleev and tyatya, in composition with alkaline, silicic-sulphate-chloride water of low mineralization. This is a classic Onsen, a hot spring bath built by the Japanese. There is an open-air stone pool ten meters from the surf line, and by pulling the plug out of the pipe, you can fill it with warm water. On the way to the Seagull, you will find a deserted beach with rocks and waterfalls, where foxes, eagles and seals swarm.