0.9 km (0.56 mi)
| artificial lake|
ca. 2.5 km (1.6 mi)
ca. 250 ha (620 acres)
| Marienkirche - Frankfurt, Oderturm, Lake Senftenberg, St Catherine's Church - F, Noor Mosque|Helenesee Wikipedia
Helenesee is a lake in Brandenburg, Germany. Its surface area is ca. 250 ha. With a depth of 56.63 m, the Helenseee is the second deepest lake in Brandenburg, only surpassed by the lake Großer Stechlinsee. It is situated approximately 8 kilometers in the south of Frankfurt (Oder). It was formed after the flooding of a former open-pit mining which started in 1958.