There's an entire quarter filled with hardcore adult entertainment, and surviving clubs from the days when the Beatles made their debut there as a band in the early 1960s. You can tour a picturesque, red-brick warehouse district set upon canals, and catch a concert at the Elbphilharmonie hall in the revamped, waterfront HafenCity. And those German-French croissant-type pastries they call Franzbrötchen, they'll crumble in your mouth – just like that.