Once you're in Edessa you shouldn't miss the mountain Kaimaktsalan. It's name comes from the fact that it's top is covered with snow, like kaimaki. You can stay in Agios Athanasios, a traditional and cosy village. At the top of Kaimaktsalan is a small church of Profitis Ilias. From this spot, where the borders of Hellas and Scopje are, you can see both sides. If you're lucky and the weather is good you can see the gulf of Thermaikos as well as the mountain Olympos.