Bathrooms No. 4, built in 1903 in the neo-baroque and classical style, is one of the most interesting architectural facilities in Ciechocinek,. The long facade of the building is divided on the axis by a break, similarly flanked on both sides. Rich ornamentation in the form of rustication and garlands prevails. The interior is similarly representative, especially the hall with mezzanines, decorated with intricate balustrades, stuccoes and paintings. Currently, the building is called the Health Resort Hospital No. 1 and it functions as a spa.