The 16th-century Duomo is mainly Catalan-Gothic and Renaissance, although you wouldn’t guess that from its Doric-columned frontage. Inside are peach-coloured walls, 18th-century chapels, and impressive Baroque marble balustrades before the statue-filled high altar.

The Fernleigh Track, part of the decommissioned Adamstown-Belmont coal train line, now serves as a destination for a highly enjoyable 15-kilometre bike ride. The track starts in the centre of Newcastle, at Adamstown train station, and goes through brick tunnels, attractive bushland and wetlands. The track is well-maintained for safe cycling, jogging and walking. The gradients are gentle, as befits an old train line, so there won't be any steep ups and downs. Stop at the Fernleigh Café in Adamstown for a delicious bite before heading back.

40km away from Katowice lies the Holocaust memorial of Auschwitz. The site consists of two former concentration camps: Auschwitz I and Auschwitz II-Birkenau. In 1979, the site was added to the UNESCO World Heritage list.