Bitlles River (Mediona-Riudebitlles) Nature · Sant Quintí de Mediona, Alt Penedès, Barcelona Image of Sant Quintí de Mediona, not of the place itself. The riu de Bitlles, also known as the riera de Mediona in its middle stretch, crosses the centre of the Alt Penedès before joining the river Anoia. Its name is documented as early as the 10th century, in texts that cite it as rivus de Birlas or Berilas, of uncertain origin; a monastery was established beside its course, which gave its name to the town of Sant Pere de Riudebitlles. Photo: Viquipèdia (Public domain) What to see and do in Sant Quintí de Mediona