Iturup Island is the largest island of the Kuriles. It is unspeakably beautiful and has a length of 200 kilometers. One of its sides is washed by the Pacific Ocean and there is the Sea of Okhotsk on the other side. Almost the whole island is a nature reserve.
There are no mountains there but it has nine active volcanoes and Stokap is the highest one. In the picture you see its crater.
Approaching the island.
People may come to these hot springs at any time of the day and swim there for free. But remember that it's going to hurt if you have a cut or a burn.
The island is rich for its mineral resources. At the time of the Soviet Union a lot of geologic works have been done there (like exploring fields and road construction) but in 90s all of it broke down.