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Museum, ruins of a post-battle chapel, monument hill and fields connected with the 1410 Battle of Grunwald. A good half-day trip from Ostróda.
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Jezioro Francuskie
Small forest lake on walking routes in the Dylewskie Hills. It is a walking destination rather than a normal bathing beach.
Park Krajobrazowy Wzgórz Dylewskich
The most hill-like landscape near Ostróda. Dylewska Góra reaches 312 m above sea level; the park has beech forests, viewpoints, walking and cycling routes, and the Lake Francuskie reserve.
Small town useful for a rail day trip, especially for the open-air museum, market-square area and food stops. A good bad-weather alternative to lake activities.
Muzeum Budownictwa Ludowego – Park Etnograficzny w Olsztynku
Large open-air museum with rural architecture from Warmia, Masuria, Powiśle and Lithuania Minor. Allow at least 1½–2 hours, more during seasonal events.
Rural area near the Szeląg lake system. Useful for agritourism, cycling and quieter accommodation outside the town.
Lake-resort village and forest area. Good for a beach day, woodland walk, cycling, kayaking, accommodation outside Ostróda or a trip combined with a cruise through lakes and locks.