Aerial views are part of my routine 'tool box' as a geologist. I use aerial photographs on a nearly daily basis for multiple reasons. Other aerial imagery is utilized as well - lidar, infrared and sometimes radar imagery. I enjoy this type of work and a there is a sense of discovery when viewing aerials.
I had previously seen the below feature when reviewing historic aerials for a project, and hence, when I got a view of it while flying out of Seattle knew exactly what it was.