Xanthi (regional unit) in the context of "Xanthi"

The Thracian Sea is the northernmost part of the Aegean Sea. It is bounded by Macedonia and Thrace as well as northwestern Turkey. It connects to the Black Sea through the Dardanelles Straight, the Marmara Sea, and the Bosphorus Straight.

The entire area of the sea lies north of the 40th parallel. Its length from east to west is from 23°E to about 25.8°E, or from the Strymonian Gulf east to the northernmost part of the Gallipoli peninsula and the width from north to south is about 40.25°N to 41°N, or from the Dardanelles north to the boundary between the Xanthi and the Rhodope regional units.

The Nestos (Greek: Νέστος [ˈnes̠tos̠]) or the Mesta (Bulgarian: Ме́ста [ˈmɛstɐ]) is a river in Bulgaria and Greece. It rises in the Rila Mountains and flows into the Aegean Sea near the island of Thasos. It plunges down towering canyons toward the Aegean Sea through mostly metamorphic formations. At the end, the main stream spreads over the coastal plain of Chrysoupolis and expands as a deltaic system with freshwater lakes and ponds forming the Nestos delta. The length of the river is 230 km (140 mi), of which 126 km (78 mi) flow through Bulgaria and the rest in Greece. Its drainage area is 5,184 km (2,002 sq mi), of which 66% is in Bulgaria. It forms some gorges in Rila and Pirin. The longest gorge between Pirin to the west and the Rhodope Mountains to the east is the 25-km long Momina Klisura in Bulgaria.

The Mesta's longest tributary is the Dospat (or Despatis). The banks of the river are covered mainly by deciduous trees that extend into halfway between Bulgaria and Greece where it forms the modern boundary of Greek Macedonia and Thrace, as well as the boundary between the Kavala and the Xanthi regional units, having first crossed the Drama regional unit. The river later forms a delta to the north where swamplands, wetlands and a lagoon once existed except in the east.

Rhodope (Greek: Ροδόπη, Rodópi [roˈðopi]) is one of the regional units of Greece. It is part of the region of East Macedonia and Thrace. Its name is derived from the Rhodope Mountains, which cover the northern part of its territory. Together with the regional units Evros and Xanthi, it forms the geographical region of Western Thrace. The capital of the prefecture is the city of Komotini. The second largest town is Sapes. Most of the Muslims of Thrace, the only officially recognized minority in Greece, are settled in this area, where they form around half of the regional unit's population.

Abdera (Greek: Άβδηρα) is a municipality in the Xanthi regional unit of Thrace, Greece. In classical antiquity, it was a major Greek polis on the Thracian coast.

The ancient polis is to be distinguished from the municipality, which was named in its honor. The polis lay 17 km east-northeast of the mouth of the Nestos River, almost directly opposite the island of Thasos. It was a colony placed in previously unsettled Thracian territory, not then a part of Hellas, during the age of Greek colonization. The city that developed from it became of major importance in ancient Greece. After the 4th century AD it declined, contracted to its acropolis, and was abandoned, never to be reoccupied except by archaeologists.

Evros (Greek: Περιφερειακή ενότητα Έβρου, romanized: Perifereiakí enótita Évrou) is one of the regional units of Greece. It is part of the region of East Macedonia and Thrace. Its name is derived from the river Evros, which appears to have been a Thracian hydronym. Evros is the northernmost regional unit. It borders Turkey to the east, across the river Evros, and it borders Bulgaria to the north and the northwest.

Its capital is Alexandroupolis. Together with the regional units Rhodope and Xanthi, it forms the geographical region of Western Thrace. The population density was 32 per km (2021).