The tripto catalogue lists 174 castles – from royal residences with full interiors to ruined strongholds on Jurassic limestone rocks. The best-known ones are worth seeing at least once.
Malbork Castle is the largest brick castle in Europe and the former capital of the Teutonic Knights on the Nogat river, a UNESCO World Heritage Site. Książ Castle in Wałbrzych, the third largest in Poland, combines the Hochberg interiors, terraces, a palm house and tunnels from the Riese project. Wawel Royal Castle has an arcaded courtyard, the tapestries of Sigismund Augustus and the Crown Treasury with the Szczerbiec sword. Moszna Castle near Opole is known for its dozens of towers and a park of more than 100 hectares, and Łańcut Castle for its original interiors, court theatre and carriage collection. Among the ruins, Ogrodzieniec on the Trail of the Eagles' Nests is the most famous.
Most castles are in Lower Silesia (more than 25), the Silesian region and Lesser Poland (more than 20 each), and the Opole region (over a dozen). The Silesian and Lesser Poland parts of the Kraków-Częstochowa Upland form the densest belt of strongholds in the country.
In practice: allow one and a half to three hours for a large castle. Main routes usually cost 50–95 zł, ruins are much cheaper, and many castles have a free day – Monday at Wawel and Łańcut (selected exhibitions), Wednesday in Brzeg. Most routes run indoors, so castles work in the rain; with children, choose shorter routes and the underground parts.