Siviri is a village in western Kassandria which is 9 km away from Kallithea. It is built amphitheatrically along the sandy coast. During the summer months, like every seaside village in Chalkidiki and especially on the first leg, it is filled with foreign and Greek tourists who visit it for their bathing or for lunch at the seaside fish taverns. Siviri is known for the Cassandra Festival that takes place each year in July and August in the large amphitheater outside Siviri.

The Kassandra Festival, which takes place in Siviri’s amphitheater, is the most famous artistic festival taking place in Chalkidiki, along with Festival Sani. Well-known Greek and foreign singers, actors and musicians, organize performances in the light of the summer moon.