Trosky Castle (Czech: Hrad Trosky) is a castle ruin in the municipality of Troskovice in the Liberec Region of the Czech Republic. It lies about 10 kilometres (6 mi) south of Semily. It is located on the summits of two basalt volcanic plugs. On the lower peak, 47 metres (154 ft), is the two-storey structure called Baba (Crone), and on the higher outcrop, 57 metres (187 ft), is the four-sided structure known as Panna (Maiden). The castle is a landmark of the Bohemian Paradise region.
