F.K. Kirsten Wind Tunnel, University of Washington Aeronautical Laboratory (UWAL), University of Washington, Seattle, Washington. Seen from above.
<a href="//commons.wikimedia.org/wiki/User:Jmabel" title="User:Jmabel">Joe Mabel</a>
CC BY 2.5
Photo by <a href="//commons.wikimedia.org/wiki/User:Jmabel" title="User:Jmabel">Joe Mabel</a>