Beldahnsee
Beldahnsee is a German place or body of water designation:
- Beldahnsee , until 1938 Wiersba , village in the Sensburg district, East Prussia, since 1945: Wierzba (Ruciane-Nida) in Piski Powiat, Warmian-Masurian Voivodeship, Poland
- Beldahnsee , inland lake in the Masurian Lake District in the Sensburg district, East Prussia, since 1945: Jezioro Bełdany in the Powiat Piski, Warmian-Masurian Voivodeship, Poland