“Walnut Amalgam” by Robert Mann.

f/ 14, 1/100 sec., ISO-200, Sigma 18-200MM F3.5-6.3 lens at 52mm, 12:34 p.m., Philadelphia, PA. Saw this on a Monday and did not have my camera with me. I noted the time and went back the next to shoot it. Light was about the same on both days, fortunately.