The city of Sofia was established next to some tracian mineral water springs. Today these mineral springs are located next to the Central bath (Tsentralna banya), Banya Bashi Mosque and TZUM Shopping mall. A new construction lets the water flow and people can drink or take some mineral water at home absolutly free of charge.
Sofia is uniqe by having 42 mineral springs with 8 different hydro-trermal zones with a temperature of 30 to 90 degrees Celsius. With the water flowing at 480 liters per second. Sofia mineral springs are deep under the ground, they are clean and can not be poluted.