End of the Thurston Lava Tube, Kilauea, Hawaii, United States
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/85979850@N00">Ewen Roberts</a> from San Diego, CA, United States
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/donabelandewen/4318852425/">Ewen at the end of the lava tube</a>