Rogner Bad Blumau

Friedensreich Hundertwasser designed this thermal resort in 1997 and covered it in grass roofs, irregular windows, gold onion domes, and floors that undulate rather than sit flat. There are no straight lines. The thermal water comes from 3,000 meters underground at 47 degrees and feeds directly into the pools.

Rogner Bad Blumau is a thermal resort designed by Friedensreich Hundertwasser in 1997, with grass roofs, irregular facades, gold onion domes, and floors that deliberately undulate. The thermal water rises from 3,000 meters underground at 47 degrees and feeds directly into indoor and outdoor pools. Located 65 km east of Graz in the Styrian thermal belt. Day admission includes full spa access; hotel stays available. Book ahead via blumau.com. There is genuinely nothing else that looks like this in Austria.