Two divers in Lake Constance at night, with the lights of Überlingen in the background
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/142673322@N02">Ansgar Gruber</a>
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/142673322@N02/31545256445/">Divers in Lake Constance at night</a>