Viehofer Platz Subway Station

In parts black smoke billows over the walls. Is it gaining ground, or is it already retreating? My hope is that this waste has lost fight. A lot of brave organic structures, big Birch-like ones and smaller plantlets, fight for a blue sky. They seem to win the fight. There are a number of light holes where the blue sky shines through. The plants will go on growing and producing more holes with blue skies.