The remains of the Vítkův Hrádek ("Vítek's Castle") lie about 5 km east of the town Jindřichův Hradec in the neighbourhood of the small village Blažejov above the valley of Hamerský Potok (Hamry Brook).

The history of the castle (probably one of the oldest in South Bohemia) dates back to the first half of the 13th century when it was founded by Lords of Jindřichův Hradec. In the second half of the 13th century it belonged to the Order of Teutonic Knights. The castle was abandoned in the 15th century and it has never been reinstated.
Only the small remains of walls and the castle moat have been preserved up till the present day.

Access to the ruins is possible along the red marked trail leading from Jindřichův Hradec through Blažejov to the small town Kunžak. Another way is by the green mark from Jindřichův Hradec to Blažejov.
The path of the instructional trail Jindřišským Údolím also passes the ruins.