Remains of a destroyed castle at the top of Kastanitsa.

Kastanitsa is a village on the slopes of mount Parnon, in Arcadia, in altitude 840m. It is historically the first recorder village of the so-called territory of Tsakonia with typical architecture and distinctive Greek dialect.

On the top of the hill above the village there is a castle which was built in the 14th century by the Byzantines of the Despotate of Mystras to control the passage from Arcadia to Laconia and Argolis.

The castle was 8m high initially. Around 1810 the it was restored by the local warlord Kapsambelis and for this reason it is also called the tower of Kapsambelis.

The fortress was demolished in 1948, during the Greek civil war and today only a few ruins remain.