Roman legions marched into what is now the Rhineland's largest city in 38 B.C. These two thousand years have produced a wealth of sites to visit, from Roman towers to Gothic churches to modern architecture. With a reputation as a fine art center, Cologne has museums running the gamut from the Museum of Applied Art to Museum Ludwig, home to works by Warhol and Picasso, to the Chocolate Museum. The city has an excellent bus, tram and train system, on which Kolner Tageskarte, Day Tickets, are valid. more »