The charming Fischerviertel, Ulm’s old fishers’ and tanners’ quarter, is slightly southwest of the centre. Beautifully restored half-timbered houses huddle along the two channels of the Blau River. Harbouring art galleries, rustic restaurants, courtyards and the crookedest house in the world – as well as one of the narrowest – the cobbled lanes are ideal for a leisurely saunter.