Castle Nový Herštejn, Gothic castle ruin in Němčice u Kdyně, Czech Republic.

Castle Nový Herštejn is a Gothic ruin situated on elevated terrain, surrounded by forest paths and woodland. The remaining stone walls display the typical medieval construction style with defensive structures characteristic of that era.

The castle was probably founded in the first half of the 14th century by Bušek II of Velhartice, though the name Protivec of Herštejn is recorded as early as 1272. In February 1475 Bavarian troops captured and burned it after Jan Herštejnský of Velhartice broke a truce. Domažlice bought the estate in 1524 and let the castle fall into ruin.

The castle's name, Nový Herštejn (New Herštejn), distinguishes it from the older Herštejn nearby. The hill and ruins are protected as the Herštýn nature reserve. The site is linked to the Lords of Velhartice, whose conflicts with Bavaria shaped its fate.

The grounds are accessible on foot and crossed by hiking paths that allow exploration of the ruins. Visitors should wear sturdy shoes as the terrain is uneven and remaining walls may be unstable.

The donjon measures 16.5 by 15.5 metres with walls about 2.3 metres thick and survives to the second floor. A pointed portal on that floor may have been reached by a drawbridge from a neighbouring building, of which only a fragment of masonry remains.