I’m still thinking about Vienna. I didn’t especially like the anti aircraft towers, but I think the toilets were excellent.
I am quite serious. You see this is a problem for transatlantic comprehension. In the USA toilets have a large pool of water. This can cause an unfortunate problem called splashing.
In Italy the toilets have a tiny pool of water and uhm material lands on a porcelain surface which is in theory (but not in practice) washed clean when the toilet is flushed. Normally one has to clean the toilet after every 2nd type use. Innocent failure to do so by people used to different toilets can cause tension.
Now in Vienna they have figured out how to make toilets. There is a serioius pool of water down which the toilet is flushed then further back towards the wall a shelf which is very slightly concave so that one or two milimeters of water pool there after each flush. This is too little to splash but plenty to prevent sticking.
I haven’t seen such toilets anywhere else.
I think that squemishness about discussing this very practical issue is preventing the diffusion of this brilliant technology around Europe.
In fact, I would even be in favor of EU toilet standards if I weren’t sure that they would be dictated by larger countries with inferior plumbing.