Zeche Zollverein is a former coal mine in Essen, Germany. It is a UNESCO world cultural heritage site, as the mine is an example of Bauhaus architecture. It is now an international centre for design. This is a photo of the staircase by architect Rem Koolhaas, placed in the old coal washing plant that now houses a museum.
Originally posted in my photo blog Sensory Input, re-added to my main blog in 2021. Original URL archived in the Internet Archive