If giant cuckoo clocks and Black Forest gateau no longer thrill, how about a trip to the world’s largest loo? Drive a couple of minutes south of Gutach on the B33 to Hornberg and there, in all its lavatorial glory, stands the titanic toilet dreamed up by Philippe Starck. Even if you have no interest in designer urinals or home jacuzzis, it’s worth visiting the Duravit Design Centre for the tremendous view across the Black Forest from the 12m-high ceramic loo.