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.
| Helenesee | |
|---|---|
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  Helenesee | |
| Location | Brandenburg |
| Coordinates | 52°16′16″N 14°29′15″E / 52.27111°N 14.48750°E |
| Type | artificial lake |
| Basin countries | Germany |
| Max. length | ca. 2.5 km (1.6 mi) |
| Max. width | 0.9 km (0.56 mi) |
| Surface area | ca. 250 ha (620 acres) |
| Max. depth | 56.63 m (185.8 ft) |
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