🇵🇱 Ryn is a town in north-eastern Poland located 19 km south-west of Giżycko, in the Warmian-Masurian Voivodeship, in Masuria. Until the reorganization of 1999 it had been assigned to Suwałki Voivodeship.
Ryn is located between Lake Ryn and Lake Ołów. Among the notable landmarks of the town are a former Ordensburg castle of the Teutonic Knights (erected ca. 1337) and a 19th-century Dutch windmill. Below the castle in the centre of the town, a subterranean channel connects the Matussek pond, a shoaled bay of Lake Ołów, with Lake Ryn and the pond of a mill built by the Teutonic Knights.