Kašperk Castle (Czech: hrad Kašperk, German: Karlsberg) is a medieval castle placed in southwestern Bohemia (modern Czech Republic, former Kingdom of Bohemia). It is said to be the most highly located royal castle in Bohemia. Its elevation is 886 metres (2,907 ft) above sea level). The castle is in property of the Town of Kašperské Hory since 1616.