Mesta River

The Mesta or Nestos is a river in Bulgaria and Greece. It rises in the Rila Mountains and flows in the Thermaic Gulf into the Aegean Sea near the island of Thasos. The length of the river is 230 km, of which 126 km in Bulgaria and the rest in Greece. It forms some gorges in Rila and Pirin.

The Mesta's longest tributary is the Dospat River. The banks of the river are covered mainly by deciduous trees that extend into halfway between Bugaria and Greece where it forms the today's boundary of Greek Macedonia and Thrace, as well as the one between the Kavala and the Xanthi prefectures. The river later forms a delta to the north where swamplands, wetlands and a lagoon once existed except in the east.
