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Drilled beneath the castle. The first was dug by the Austrians late 18th century from Zabowka to Bulowy street. In the 1940s the Germans extended this and added a cross-tunnel (north-south) for air raid shelters. You watch an introductory video then go below (bring a sweater) and have to solve puzzles (in Polish) to get out, so it's a sort-of family friendly escape room. Booking via castle essential, adult 12 zł.
This is the main market square, with most of the town amenities and sights clustered around. Many of its buildings including Town Hall (below) were rebuilt in the 19th century after a couple of disastrous fires, so there's a pleasing unity of style.
Ratusz
Local history museum within the town hall, which was built in the 1870s. It is a branch of the larger museum in the Castle.
Museum Zamek
13th century Gothic defence tower with 16th and 20th century extensions, near the river - too near, as many of the fortifications have been washed away. With small museum, and you can climb to the top of the tower.
This is a striking modern (1983) Catholic church near Aleja Tysiąclecia
Auschwitz Jewish Centre
Museum about the former Jewish population of Oshpitzin, which in Yiddish means "guests". Includes the Chevra Lomdei Mishnayot synagogue and Cafe Bergson. Online booking essential.
dating from mid-18th century, is a bosky place at the corner of Dąbrowskiego and Brzegi. Smashed up by the Nazis in 1941, it was repaired post-war but no further burials took place.