Kardzhali Reservoir is among the largest reservoirs in Bulgaria and is characterized by its walls – one of highest dam walls in Europe - 109 m.
The great bays, peninsulas and meadows along the banks make it a great place for sports, fishing trips, leisure and pastimes.
“Kardzhali” is one of the largest reservoirs in the country with one of the highest (109 m) dam walls in Europe, 341 m long. It is situated in the Arda River Valley, about 3 km from Karzhdali. At present, the waters are used for industrial purposes and irrigation. The dam was commissioned into service in 1962. The length of the water reservoir is about 22 km with an average depth of 60 m.
The great bays, peninsulas and meadows along the banks make it a great place for sports, fishing trips, leisure and pastimes.

Steep slopes with eye-catching rock formations rise above the waters. One of these is called “Halkata” (eng: the Loop; the Ring). The rock phenomenon has a huge gap in the middle and offers a wonderful view to the lake and the nearby villages. There are many ruins of ancient fortresses around. The best-preserved and situated is the Patmos fortress. The castle is located on a romantic peninsula that divides the waters into two forks. The nearby”Bezdiven” Peak, overlooking the fortress, offers stunning panoramic view of the Arda River bed. The "Kardzhali" Reservoir offers many attractions for various types of tourists – water restaurants, hatcheries, boat rentals, boat trips... Lots of athletes practice at the rowing base here and competitions are regularly held.