Visit Mega Spilaio. Located in a large cave,on the steep cliffs of Vouraikos gorge in Chelmos. According to tradition this is one of the oldest monasteries in Greece, it was destroyed during WW2 and rebuilt after the war.
Visit mount Chelmos or Helmos (Aroania oroi), the highes peak in Achaia (2355 m.). There are many trails on mount Chelmos, but the nicest path goes from Kalavrita to Diakopto, along the Vouraikos gorge. Start early at Diakopto, take the Odontotos, the funicular railway, to Kalavrita, and walk back to Diakopto.