The Hundertwasser Public Toilets in Kawakawa, New Zealand are world famous, if only in New Zealand, although they are very popular with tourists.
Friedensreich Hundertwasser was Austrian and immigrated to New Zealand and lived in Northland. He was an artist, and when the council wanted to renovate Kawakawas toilet, he was chosen to design the new design. The design is unique inside and out. See Google Maps here https://goo.gl/maps/nTKVYhTQMP32