A picture made available on 13 May 2016 shows The post mill behind a yellow rapeseed field in Wilhelmsaue, Germany, 12 May 2016. The post mill was built between 1883 and 1884 and is today the last of it's kind in the region. On Pentecost Monday 16 May 2016, the 23rd German Mill Day is taking place, and the post mill will be open from 10AM to 5PM. (Photo by Patrick Pleul/EPA)
