The Széchenyi Medicinal Bath in Budapest (Széchenyi-gyógyfürdő)
is the largest medicinal bath in Europe.
Its water is supplied by two thermal springs,
their temperature is 74 °C (165 °F) and 77 °C (171 °F), respectively.

Components of the thermal water include sulphate, calcium, magnesium, bicarbonate
and a significant amount of fluoride acid and metaboric acid.
Medical indications are on degenerative joint illnesses, chronic and sub-acute joint inflammations,
as well as orthopaedic and traumatological post-treatments.

The bath can be found in the City Park, and was built in 1913 in Neo-baroque style
to the design of Győző Czigler.
At that time it had private baths, separate men and women steam-bath sections,
and different men / women "public baths".
The complex was expanded in 1927, and it still has 3 outdoor and 15 indoor pools.
After its expansion, the thermal artesian well could not fulfill its purpose,
so a new well was drilled. The second thermal spring was found in 1938.
Main swimming and thermal sections are possible to visit mixed.

A (4) image [hand held] Panorama stitched in PTGUI 9 Pro to express how big this place really is.

An aerial view: