Kayangan Api Bojonegoro is a natural eternal flame in the middle of teak forest in Bojonegoro, East Java
<a href="//commons.wikimedia.org/wiki/User:M.akbar.raf" title="User:M.akbar.raf">M.akbar.raf</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>