The Oslawa (Czech: Oslava, German: Oslawa, Ukrainian: Ослава) is a river in South-Eastern Poland. Its name comes from the ancient west slavic dialect word osła, meaning "stone". It begins in the Bieszczady mountains and flows through western Sanok Land. The river ultimately flows into the San River at Zaslaw, north of Zagorz. Panorama shows the stretch of the river, which is covered by a nature reserve "Przelom Oslawy pod Mokrem" moore...