Aylin our wandurful tour guid took us on a four hour city tour. Not only was she kind, generous and efficient, but she was also great at giving us ideas for things to do on the following day. She is well informed and made us fall in love with the city. The stories she told will stay with us forever. It would be impossible to imagine Cologne, without having done this tour. It was the highlight of our trip. Also i would like to add that we have booked this tour tour with viator and everytime we were directed to this company based in India. We were surprised but then we found out that they only use local guides. They were really professional and answered every e-mail right away. They even adjusted the meeting point when we asked. Before every tour they would send us a reminder along with pictures of the meeting point. And they did a great job. We were really impressed.