Piwnice Radio Observatory is the scientific counterpoint to Torun's medieval brick and Copernicus heritage. North of the city, the Nicolaus Copernicus University observatory operates radio telescopes, including a 32-metre dish used in international radio astronomy networks.
It is most rewarding if you have an interest in astronomy, engineering, or unusual landscapes of science. Check visitor options before going, because this is a working research facility rather than an always-open museum.