The rural roads all over Greece are a little challenging for a driver with a car rental. You will find really narrow streets with damaged asphalt, in the countryside. In terretories where the villages are built in the mountains, the roads have many turns, are narrow and windy.
Keep in mind that if you want to rearch a beautiful picturesque village hidden in the mountains, you will need to have a good GPS because the roads in many places don’t even have signs or striping. Be aware, that you may find many flocks of sheeps or goat on your way!