The Site of Hitler's Former Bunker - Berlin
Among red-roofed communist houses from the 80s sits a car park. No markings, no memorial, no structure, leaving no trace for Neo-Nazis, below the spot where Hitler committed suicide in 1945. They resisted marking this spot until the World Cup in 2006. They then added this small sign.
If you're really interested in Nazi Germany, consider taking our Third Reich Tour where we dedicate a full 3.5 hours to the subject.