Hrádek nad Nisou is a town in Liberec District in the Liberec Region of the Czech Republic. It has about 7,700 inhabitants. The historic town centre is well preserved and is protected by law as an urban monument zone.
Wikipedia https://en.wikipedia.org/wiki/Hrádek_nad_Nisou
Official Website http://www.hradek.eu/
Coordinates 50°51'8.002" N 14°50'37.2" E