| Petnja | |
|---|---|
| Lake type | reservoir |
| Basin countries | Croatia |
| Max. length | 1.1 km |
| Surface elevation | 150 m |
Petnja Lake is an artificial lake located 3.5 km from the municipality of Sibinj (Završje) and 7 km north-west of the city of Slavonski Brod, Croatia.
The lake is surrounded by an ancient Slavonian forest and is called "The eye of Dilj". There are also 3 caves in the area and numerous water sources.