Letty wrote: Explain about a thermal pool, if you will.
It's a thermal sole bath.
The saltwater thermal spa is located in the spa gardens/park and is supplied by its own bubbling spring which rises from the ground at a temperature of 33°C.
that means: thermal sole (2 sources), salt concentration 12.8% and 9.7%, CO2 concentration ... miligrams per liter, iodine ... miligrams per liter, iron .... miligrams per liter, temperature 88.16°F and 92.94°F.