Things that stick with you for some reason: In the 90s there was an ad for Waste Management that featured one of its trucks driving past an ornate iron and glass canopy at night, and as a kid I wondered where that was because of how picturesque it looked. Fast forward to today and the same structure appeared in an article about Seattle. A little digging and I learned that it's the Pioneer Square Pergola. So mystery finally solved.
(photo from pioneersquare.org)