We tried a couple of wildly different spas; the famous Gellert in all its understated glory and the Turkish C16 Kiraly.

Electrical storms over Gellert added drama to a blissed out soak but I preferred the quiet of the old spa, watching the shafts of sunlight play across the water.  Once the first half hour of mental fidgeting is over, I am a complete convert to the spa experience despite the terrifying monobrowed Hungarian lady bouncers.

First shot is Gellert but add in a few hundred people.  Second is Kiraly where it was pretty much like the picture.