
Take the train south from Patras. If I remember it was less than two hours. Since all the station signs are in Greek, pick up a translation card at any train station.
Right next to the train station there is a fenced in orange grove. It's quite small, maybe 8 trees, but tonnes of oranges. No one cares if you help yourself. The town is filled with orange and citrus trees. I found if I just asked people were more than happy to share.