Kosta is located in Peloponnesus, right opposite Spetses, 180 kilometers far from Athens. To get there, you should follow the Motorway from Athens to Korinthos, and leave the motorway in the exit towards Epidavros, and then follow the signs to Ermioni-Kranidi-Kosta-Spetses. * Notice: Cars are prohibited in Spetses!. See here the route.
After Kosta, you will cross the sea to Spetses on a boat, on a ferry or on a sea taxi.
Cars are prohibited in Spetses!