Some sort of HVAC tower atop a building at 6th Avenue West and West Nickerson Street, Seattle, Washington, seen looking roughly southwest from the South Ship Canal Trail.
<a href="//commons.wikimedia.org/wiki/User:Jmabel" title="User:Jmabel">Joe Mabel</a>
Photo by <a href="//commons.wikimedia.org/wiki/User:Jmabel" title="User:Jmabel">Joe Mabel</a>