Drone view of Trigonion Chain defensive Tower and fortifications at upper town of Ano Poli in Thessaloniki, Greece, Europe

photography horizontal color image travel destinations travel no people outdoors day greece europe thessaloniki roman ancient rome trigonion chain tower architecture ano poli townscape town high angle view drone point of view aerial view fortification tree nature building trees travel destination tourist destination tourist destinations towns towers outdoor outside nobody no one no person daytime colour image color colour buildings architectural