This is a great way to see all the popular spots in Cologne for a reasonable price - at 15 euros for the hop on, hop off tour I was able to enjoy all the sites at my own pace. The bus was it good condition, clean and the driver was very friendly. They offer head phones so you can listen to an audio tour if you are interested. Since I was traveling alone I felt safer riding the bus rather than walking everywhere. It was a great day and I would recommend it to anyone! read more