A rewarding trip can be made southwest through the Euganean Hills (Colli Euganei), a volcanic range rising abruptly out of the plain and reaching a height of 603m/1,990ft in Monte Venta. There are numerous hot springs and a number of popular spas in the hills, among them the world-famous thermal resort of Albano Terme (14m/46ft; pop. 17,000),
the Roman Aquae Patavinae or Fons Aponi, where hot radioactive springs (87 °C/189 °F) deposit mud of volcanic origin, which, when pulverised and mixed into a paste with hot water, is known as "fango" and is used in the treatment of gout and rheumatism.