The ruin of Sokolčí castle is located about 6 km to the east of Kaplice on the Hradiště hill.
Sokolčí castle was originally owned by the Lords of Michalovice. The owner of the Velešín estates Jindřich z Benešova (Velešína) who owned also Sokolčí castle, passed his estates over to Lords of Rožmberk at the end of the 14th century. Sokolčí castle became part of the Nové Hrady estates. The last mention of the castle is dated 1541 when a statement of Peter V. von Rosenberg in the land files said that the above mentioned aristocrat keeps "Hradiště village and there is also a ruined castle, called Sokolčí".