Blansko is a village in Semily District, in the Liberec Region, Czechia. Blansko lies at 562 m above sea level, at the foot of the Giant mountains. The nearest city is Jablonec nad Nisou, 17.7 km to the west. Among the landmarks around are Trosky Castle (26 km), Valdštejn Castle (24 km) and Hrubý Rohozec Castle (23 km). Among the natural features are Przełęcz Szklarska (11.7 km) and Mumlava Waterfall (6.9 km).