The Széchenyi Medicinal Bath in Budapest (Hungarian: Széchenyi gyógyfürdő, pronounced [ˈseːtʃɛɲi ˈɟoːɟfyrdøː] as if the ch were spelled cs) is the largest medicinal bath in Europe.

Components of the thermal water include sulfate, calcium, magnesium, bicarbonate and a significant amount of metaboric acid and fluoride.

From 1865 to 1875, Vilmos Zsigmondi drilled a hole beneath the park that was 975.36 meters deep (3,200 feet).

The bath, located in the City Park, was built in Neo-Baroque style to the design of Győző Czigler.

The pool construction cost approximately 3.9 million Austro-Hungarian korona.