First of all, thank you Daniel for the course and inspiration!
Here's my photo of Polytechnic Museum, one of the major Moscow landmarks. It was under reconstruction for like eight years, facades hidden under construction mesh and banners.
So I picked it for testing your retouching technique, and it was really bad idea. There are almost no volumes in the facade — it is almost 2d, yet look at all these details! So I realised I've got to spend eternity in photoshop with the pen tool, or cheat a bit and use luminosity masks just to slightly increase contrast of the structures. I'm not sure if i mind dirty shadows on the sides of the building, cuz instead if fixing them I'd better find another builing, nice and round, with lots of volumes and with no decorations. There's an awesome Le Corbusier building not far from my place..