Lower Lake
Niedersee is a place and a water body name:
- Niedersee (St. Ulrich am Pillersee) , place in Tyrol, Austria
- Lower Lake , until 1938 Rudczanny , Sensburg district, East Prussia, from 1945 Ruciane , since 1966 district of Ruciane-Nida in the powiat Piski, Warmian-Masurian Voivodeship, Poland
- Niedersee , lake in Masuria, East Prussia, since 1945 Jezioro Nidzkie in the Warmian-Masurian Voivodeship, Poland