Janské Lázně, a non-traditional gate to the Krkonoše Mountains, the highest of the Czech mountain ranges, is located at the foot of Černá hora at an altitude of 670 metres above sea level. In every season of the year, visitors to Janské Lázně can admire the picturesque scenery and peculiarities of the mountain landscape of the Krkonoše National Park. The local curative springs were first mentioned in historical annals as early as the 15th century. Since then, the local resources have been used to treat a variety of diseases. In 1935 a children’s sanatorium specializing in the treatment of polio, modelled on the Warm Springs in the USA, was opened in Janské Lázně, the first institution of its kind in Europe.