Dear Woodpeck. Next time I will specify the sources for each of my posts (my bad, sorry), but it will become heavy in a region of Italy, not Austria, where the official language is Italian with same value, by the law, of German. 
The region is bilingual (trilingual in a part of it) and is mandatory to use both of the languages; so you assumed wrong. Law is law. And the owners of the complex respected completely as you can see in the sources I report after.
No one reported the German sources by the way; what I see German denomination are always kept as correct by default, why? Because local residents, mostly German speakers, are entitled to avoid the law? Anyway the sources (all https://www.acquarena.com): for "parcheggio" here: https://www.acquarena.com/it/come-raggiungerci/index.html; for the pool denominations I found the ones present here: https://www.acquarena.com/it/pools/
I used "Solebecken - Piscina di acqua salata" and not "Solebecken - Vasca salina", because "Vasca salina" in Italian sounds funny.
Have a nice day