The heights of floods from the Rhine River over the centuries are marked on the city walls.
{"Image Make": "Canon", "Image Model": "Canon EOS 20D", "Image DateTime": "2011:11:20 19:29:45", "Image ExifOffset": "102", "EXIF ExposureTime": "1/15", "EXIF FNumber": "13", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "400", "EXIF DateTimeOriginal": "2011:07:11 07:44:59", "EXIF DateTimeDigitized": "2011:07:11 07:44:59", "EXIF ShutterSpeedValue": "128021/32768", "EXIF ApertureValue": "15157/2048", "EXIF ExposureBiasValue": "-1/3", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "40", "EXIF ColorSpace": "sRGB", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard"}