Agistro or alternatively Agkistro , is a village in the Serres regional unit, Greece. The village is part of the municipality of Sintiki. Agistro lies near the Greek-Bulgarian border and 10 km from the border crossing of Promachonas. The village's main tourist attraction is its steam bath complex, which dates from the Byzantine period.
Despite its distance from main cities (or because of its location on the borderline), around 100,000 tourists visit Agistro on an annual basis.
Despite the general financial crisis in Greece, there is no local unemployment, with over thirty businesses catering to the tourist industry. The main attraction is the Byzantine spa complex which has been recently renovated.
The complex has seven bathtubs, of which the oldest one dates to 950 A.D. It is open all year round, 7 days a week, 24 hours a day.
The accessibility is one of the main positive factors, as people can enjoy an entire weekend on the premises.
The temperature of the water is between 35 and 39° C and its quality is hypotonic, slightly radioactive, suitable for curing rheumatism, and arthritis.
In Fort Roupel, which is today a war museum, memorial celebrations are held each year on the 6th of April.