I don't think that the places named above are really untouristic. Maybe Bath only is not that well known to most continental Europeans, but still a magnet for English tourists.
I have been to Bratislava, München, Krakow and Valencia. It was impossible to avoid hordes of tourist groups there, although they might have not been as uneducated and abundand as those in Ibiza or Amsterdam.
If someone wants to travel to real unusual tourist regions which are worth visiting, I would recommend to go to the unexplored parts of Eastern Europe! Some of which I have visited were:
-the Carpathian Mountains, especially Transylvania with places such as Cluj-Napoca, Sibiu or Brasov.
-East Galicia in Ukraine, especially Lviv
-maybe the eastern shores of Lithuania, Klaipeda and Curonian sand peninsula
-all of Russia outside of Moscow and St. Petersburg. Especially Volgograd got me stunned