Plot: Happy Traveller travels in Kozani, one of the most special and beautiful areas of Greece; the municipality of Servia - Velventos with the imposing bridge over the beautiful artificial lake of Polyphyto. Eftyhis explores all the beauties near the beautiful village of Neraida, the waterfalls of Velventos, the vast vineyards on the shores of the lake and the Byzantine castle of Servia and Boucharia-Nochtaria