Łydynia is a river of north-eastern central

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...

, a left tributary of the

Wkra Wkra is a river in north-eastern Poland, a tributary of the Narew river, with a length of 255 kilometres and a basin area of 5,348 km² - all within Poland.Sochocin Sochocin is a town in Płońsk County, Masovian Voivodeship, in central Poland. It is the seat of the gmina (administrative district) called Gmina Sochocin. It lies approximately north-east of Płońsk and north-west of Warsaw. The town has ...

, with an overall length of 72 kilometers.http://portalwiedzy.onet.pl/54590,,,,lydynia,haslo.html (Polish language) The river flows past Ciechanów and its ancient Mazovian ducal castle. Its own tributaries include the Giedniówka, the Dunajczyk, the Stawnica, and the Pławnica.

References

Rivers of Poland Rivers of Masovian Voivodeship {{Poland-river-stub