At the foot of Puʻu Poliʻahu, one of the craters of Mauna Kea. From left to right: the Caltech Submillimeter Observatory, James Clerk Maxwell Telescope, and four of the Submillimeter Array receivers.
<a href="//commons.wikimedia.org/wiki/User:Denys" title="User:Denys">Denys</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>