dusseldorf, north rhine-westphalia, germany, july 10, 2021: rheinturm düsseldord with düsseldorf stadttor as city gate or town g

area ban building caution children city concept construction copy danger deutschland development düsseldorf education fence forbidden gate german germany house industry isolated job note parents prohibition responsibility responsible rheinturm safety secure security sign signage site space stadttor street tourism tower town travel under urban warning yellow