I suppose it may look as if that second funnel is emitting steam or gas or something, at least it does to me. But it's not. That's actually just a cloud above the funnel. These funnels are mere air vents at the north end of the underground portion of Highway 99 in Seattle. There is an identical set of funnels at the south end of the tunnel. Infrared with Sigma Quattro SD, Sigma 30/1.4 and Hoya R72 filter.