Štiavnica is museum-rich. First up is the Jozef Kollár Gallery on Námestie sv Trojice, which exhibits everything from medieval madonnas to twentieth-century watercolours. A few doors down is the Mineral Museum, which houses exhibits on the technical development of mining. New Castle contains a little museum about the Ottoman Wars in Slovakia. All of these museums are run by the Slovak Mining Museum (muzeum.sk) and have the same opening hours and prices.
At the Open Air Mining Museum, 1.5km from town, you can take a trip down the old mines, while 3km from town the Museum of St Anton (msa.sk) is the kind of tapestry-heavy, trophy-stuffed manse that helps to while away a rainy morning.