A view inside the tunnel along Rock Creek Parkway near the National Zoo. During the warmer months, people using the multi-use bike/walk/run path that parallels much of Rock Creek Parkway (which L, Sisu, and I were when I took this photo) you'll be able to avoid this tunnel by taking a side path that's been built for that purpose. However, that path is closed during the winter for some reason, forcing bikers/walkers/runners to go through this tunnel on the tiny narrow sidewalk along one side. That's not a very fun thing to do, but I do think the picture is cool.