This is a detail from one of the Böhmerwaldplatz subway station pillars.
After my nice encounter with the subway security a few days before I decided to proceed with some more shots from under the surface. Bought me a platform ticket for 40 cents and waited until closing to click a few times.
Well, got a few shots done, but this one was the most intriguing, so I worked a bit on the colors, and voilà, that is the result.
Good fight, good light to everybody