Longstay Vacation at Cologne Discover Cologne and all its sights without any stress with our longstay offer. Stay 4 nights and save 25%! And did you know that as a Lindner Nights member you save a further 10%? Become a member here. The offer comprises: 4 overnight stays Bookable on request and according to availability. Additional costs may be incurred for services for children in the booked offer, which are billed at the hotel.