Burg Neudenstein, Medieval castle in Völkermarkt, Austria.

Burg Neudenstein stands on a rock cone above the northern shore of the Völkermarkter reservoir. Its irregular polygonal plan follows the rock, with a five-storey wing and three four-storey wings around an uneven courtyard. Renaissance arcades run on three sides at the first and second floors, and the round-arched south portal bears the coat of arms of Baron Johann Karl Kemeter and his wife with an inscription stone of 1675.

On 14 September 1329 Duke Henry of Carinthia and Tyrol granted Konrad III von Auffenstein, governor and marshal of Carinthia, permission to build the castle on the hill. In 1368 a revolt involving the Auffensteins brought it to the Carinthian dukes, who passed it to loyal families. Christoph Plumegger added the tall north wing around the mid-16th century, and Johann von Kemetter restored it in 1671; his line held it until 1731.

The courtyard displays baroque arcades from the 17th century with busts of Roman emperors and paintings depicting the falls of Icarus and Phaethon. These artworks give the inner court a learned, almost museum-like quality shaped by Renaissance ideals.

The grounds include parking and connect directly to the Drauradweg cycling path, which runs beneath the fortress. Visitors can easily reach the site by bicycle or by parking if arriving by car.

The castle's gate tower with its drawbridge was demolished in 1841, and the keep followed in the second half of the 18th century. The corner towers lost their 17th-century baroque roofs in later rebuilds, so little of the fortified outline survives. The south and east wings still hold masonry from the 1329 construction.