In the page's words:

Would you like to get to know the magic of the city, its people and its history? Then you've come to the right place on vacation in Cologne. In the first two weeks of the summer vacation, over 50 exciting excursions away from the main tourist attractions await you. Whether it's "Cologne from above", "At night on Melaten", a historic fire department tour or our "Büdchen" time travel. As always, there are plenty of new tours on offer. Cologne may be broke, but it's not boring.

We look forward to seeing you!