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Photo: Jakub Hałun, CC BY-SA 4.0 via Wikimedia Commons
This was built by Casimir the Great in the 14th century. It was wrecked by the Swedes in 1655 and abandoned.
Olsztyn Castle – castle ruins located in the Olsztyn, Silesian Voivodeship, Kraków-Częstochowa Upland, lying on the Trail of the Eagles' Nests – formerly protecting the southern border of the Kingdom of Poland. The ruins of the 14th-century castle are one of the biggest attractions of the area.
© OpenStreetMap contributors
This is a necropolis of the Lusatian culture or Nordic Bronze Age, with graves and funeral goods dating back to around 700 BC.
Muzeum Produkcji Zapałek
Production of matches began here in 1882. What you see now is the process from 1930, when the factory was re-built after a second fire; a third fire in 2008 busted the owners and it never resumed production. Guided tours (only in Polish) walk you through the manufacture.
Bazylika Archikatedralna Świętej Rodziny
Built from 1901 to 1927 in sturdy Neo-gothic redbrick, with the towers added in 1997, it's cavernous inside.
The oldest church in town, from early 15th century.
The medieval town had a large Jewish population, and in the 18th / 19th century was a hotbed of Frankism, an anarchic Jewish sect. Almost all 30,000 were wiped out in 1941, events depicted in Art Spiegelman's graphic novel Maus.
Ratusz Miejski
This is the main site of the museum, exhibiting history of the city and its citizens. There's a viewing gallery atop the clock tower. However vandals ripped open a water valve and flooded the place: the exhibits were saved, but it's not known if the building will be reparable.