Obra is a river in west Poland, a left tributary of the Warta river, with a length of 171 kilometres and a basin area of 2,760 km2. The river is popular with canoe and kayak enthusiasts and an established canoe trail exists.
Obra is a river in west Poland, a left tributary of the Warta river, with a length of 171 kilometres and a basin area of 2,760 km2. The river is popular with canoe and kayak enthusiasts and an established canoe trail exists.
