To the west of the capital a landscape of hills and forests opens up to visitors along the Berounka and Vltava rivers and in the Křivoklát area, Brdy Hills and Czech karst area. It was here that the Czech kings and notable members of important noble families built their residences. Witnesses to those times include Karlštejn, Křivoklát, Krakovec, Točník and Žebrák castles, Hořovice, Dobříš, Nižbor, Roztoky and Nelahozeves chateaux and the Přemyslid dynasty-era fort at Levý Hradec.