I'm a little late sharing, but this is a sketch from the tower of the Old Post Office Pavillion in DC. We headed there for our most recent sketchcrawl (and later found out well we timed our visit, as the site was just a couple weeks away from a major renovation) thanks to the suggestion of Matt Malone.
The highlight of the sketchcrawl was the amazing view to be had from the clock tower, an open air space with 360 degrees of DC around it. It was fricking freezing though, so I didn't manage much more than a few chicken scratches before retreating back to the main hall. I have a few pages of unfinished drawings, but this one I managed to get done after paying it a little more attention at home.