Dršťka, Medieval castle ruins in Central Bohemia, Czech Republic.

Dršťka is a castle ruin in Central Bohemia situated on elevated ground with visible stone remains. The fragments display Gothic features and sections of the original defensive walls that defined the medieval structure.

The castle was built during the medieval period as a fortification for local nobility controlling surrounding territories and trade routes. Over time the structure fell into disrepair and became the ruin visible today.

Local legends surround the ruin: at summer noon three white-clad fairies with wreaths on their heads are said to dance on the meadow before the castle, and at midnight skeletons with crosses and aspergilla are said to emerge while fiery wheels and balls shake the rocks. The castle's name also appears as Ronšperk, Losumberk or Drštka.

The ruins lie in the former Brdy military area, abolished on 1 January 2016, about one kilometre south of Skořice on a buližník ridge at roughly 540 m. Only terrain irregularities and small masonry fragments survive, so expect no marked trail or facilities; the site was long closed to the public.

The site's location provides expansive views across the Central Bohemian landscape, and visitors can still discern remnants of the original defensive system in the terrain itself. These spatial features help explain the medieval strategy behind choosing this position.