Another great visionary in architecture was Hundertwasser. His philosophy was quite to Soleri. What is particularly notable about his work is that he wanted it to be used and practical. The Hundertwasser Haus in Vienna is amazing and used as a social housing project (it also houses the museum so you can get a glims of what it looks like inside). If you ever go to New Zealand I highly recommend to see the Hundertwasser toilets in Kawakawa.