The rock, on which the castle was located, was created as a filling of the volcanic chimney at the beginning of the Quaternary and determined the shape and floor plan of the castle. At the highest point of the cliff are traces of the foundations of a probably residential tower with a floor plan of an irregular trapezoid. One level lower, on the west side, there is a large cistern carved into the rock on the rock plateau. On the south side there is a jammed small platform through which the building with the cistern could be entered and on the east side there is about 9 m lower another platform with a bedrock, where there could have been very small farm buildings between the rocks. This area could later be extended further east, where there were probably other farm and defense facilities. However, apart from three jammed stairs at the edge of the area, no traces of them have been preserved.The highest part of the castle was probably accessible only by a ladder, which kept the upper castle and cistern well protected. In the vicinity of the former tower there are traces of the location of the walls and their disposition indicates a small yard with an entrance to the wall, or a small guardhouse. In the western part, about 5 m lower, the mentioned cistern begins with a traces of a roof or a water collection device. The medieval origin of the locality was also confirmed by a research by M. Matejka and P. Gutek, as well as by the results of a smaller research by Z. Drenka in 1962.

Not much information has been preserved about the history of the castle, on the site of a natural rock formation called Soví hrad - Owl Castle. The rock itself formed as a volcanic chimney filling in the last phase of volcanic activity at the beginning of the Quaternary. At the top of the hill there are clear traces of the castle, whose medieval origin was confirmed by a smaller archaeological research.

Many sources mention the village of Šurice in connection with the servants of Beckov castle, later the castle soldiers, who inhabited it and probably built a fortress on the site of Hajnáčka, so it is possible that before the Tatar invasion in Hajnáčka there was a small fortress, as Hajnáčka Castle itself is mentioned later.

In the document of Belo IV. from 1245 it is mentioned that Budik's son Tivadar, Ompud's son Visobur and Farkaš's son Dema, servants of Beckov Castle from the village of Šurice, fortified the Dánoskő hill at their own expense at the time of the Tatar invasion. Therefore, the king freed them from the rights of Beckov Castle and gave the mentioned castle to them and their descendants in the hereditary property on condition that they commit themselves to services in the royal army.

Most likely, the Dánoskő Castle, now known as the Owl Castle, mentioned in the document, was built by the same servants as a defense against the Tatars on an 85-meter-high rock. At first, it was just a hastily built fortification, which used the rock cliffs for its defensive benefit and withstood the attack of the Tatars.

In the end of the 13th century the cavalry master Kakas of the Rátót family, the ancestor of the Kakas family in Kaza, has rebuilt the fortifications into a castle. The castle is first mentioned in 1341, when it belonged to Kakas' son Ján and then to his sons Ladislav and Ján. The castle is still mentioned as their property in 1372 and 1375. In 1385, when Queen Mary donated properties to Ladislav, the castle is no longer mentioned and in the document of King Sigismund from 1415 it is mentioned as a ruin.

Count Eugen Nyáry made excavations on the castle hill in 1870, from where he managed to collect fragments of pottery and many other objects. The findings prove that this place once played a strategically important role and was inhabited as early as the Stone Age.

The medieval origin of the locality was confirmed by the focus of M. Matejka and P. Gutek, as well as the results of a smaller survey of Z. Drenka in 1962.

The upper castle and the still visible cistern carved into the rock were located on the highest plateau of the rock. This part is accessible only by climbing almost 10m of rock, it is strongly not recommended for inexperienced climbers. In the vicinity of the former tower there are traces of wall beds and their disposition indicates a small courtyard with an entrance in the wall, or a small guardhouse.

There are no myths available.

The site is freely accessible

https://www.hrady-zamky.sk/sovi-hrad/