The Auschwitz State Museum has published a 26-page booklet dedicated to Bunker 2 in Auschwitz-Birkenau (Bartosik & Martyniak, "Biały domek". Historia zagłady w bunkrze II, 2017). As already suggested by the front cover, the gassing facility known as Bunker 2 (in some accounts also Bunker 5) has been spotted on a photograph taken by the SS - AFAIK its only appearance in a contemporary ground photograph (Figure 1).
| Figure 1: Construction site in Auschwitz-Birkenau, 1943 (Yad Vashem Archives, Photo Archives, Album FA157/344, Item 66393) |