Odensjön, Circular lake in Söderåsen National Park, Sweden.

Odensjön is a circular lake in Söderåsen National Park in Scania. It spans roughly 150 meters across with a maximum depth of 19 meters.

Odensjön is a glacial-formed lake, a product of the ice that shaped the Söderåsen ridge. It lies within the Söderåsen Natura 2000 area and is protected under the EU Birds Directive. The lake is circular, 150 metres in diameter and 19 metres deep, ringed by 30-metre cliffs.

The name comes from the lake's circular shape, compared to the single eye of the god Odin. Legends grew around the water: it was long held to be bottomless and linked to the crypt of Lund Cathedral, and two giants, Blink and Börta, were said to live so deep beneath it that they could no longer hear church bells. Since 1993 the Kultur i Natur concerts have been held here in August, with artists performing from a raft on the lake.

Fishing is possible thanks to stocked rainbow trout, brown trout, pike, perch and roach, but a fishing licence is required. The Skåneleden trail passes along the lake's edges on the stretch between Åstorp and Röstånga.

The lake's name comes from its circular shape, compared to the single eye of the god Odin. Legends say two giants, Blink and Börta, lived so deep beneath the water that they could no longer hear church bells, and that a castle tower can be seen in the depths when the water is clearest.