If you approach Skala Kalloni from the main road (Kalloni-Parakoila), turn left just before the football field and continue straight.
If you approach Skala Kalloni from the western embankment of the Tsiknia River, the Center is the first building you will encounter on your right when you reach the settlement, right at the top of the public parking.
There are wooden signs in Kalloni to help you navigate.