The ancient city of Edessa spread over the lush plain of Longos, below the rock with the waterfalls, where its acropolis stood. The city, which had strong walls, public buildings and temples, flourished in the 4th century BC, during the years of the Macedonian kings Philip and Alexander the Great. Its prime continued into Roman times. The lower city was abandoned in the 6th century AD and its residents moved to the acropolis, which developed into the Byzantine city, the “god-guarded castle of Vodena”, which took its name from the river Voda (Edessaios). At the archaeological site of Longos, in ancient Edessa, the city’s main street has been excavated. The cobbled road had galleries with marble pillars on both sides. Along the central street the foundations of various buildings have been discovered, which were quite possibly shops, residences and warehouses. A path for nature lovers leads from the ancient city to the monument of Agia Triada, the waterfalls, the Kanavourgeio and, finally, Edessa.