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Historic early-20th-century villa, also known locally as Pałacyk Willa Gladtke.
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Secesyjna kamienica przy ul. Jana Pawła II 4
Art Nouveau tenement house from the early 20th century.
Indoor swimming pool and recreation complex with sports pool, recreational pool, jacuzzi, saunas and salt grotto. Useful in bad weather or outside the lake season.
Kościół Niepokalanego Poczęcia Najświętszej Maryi Panny
Neo-Gothic Roman Catholic church from 1856–1875; the tower was added in the early 20th century. Worth including on a short walk through the older streets east of the lakefront.
Early-20th-century villa on Sienkiewicza Street.
Kościół ewangelicko-metodystyczny
Neo-Gothic church from 1907 and one of the most recognisable buildings in the town skyline. Its tower, reached by 105 steps, functions as a viewpoint over Ostróda.
Kamienica przy ul. A. Mickiewicza 9
Tenement house from 1896 in the centre of Ostróda.