Umi jigoku (means <i>torture of Sea</i>) in Beppu, Oita prefecture, a famous onsen resort on the island of Kyushu in Japan.
<a href="//commons.wikimedia.org/wiki/User:Mkill" title="User:Mkill">User:Mkill</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>