On the andesite rocks of the popular tourist hill of Sitno, there is a castle ruin of the same name. Sitno Castle used to be a massive, medieval stone castle built in the 13th century.

Sitno Castle boasts of an excellent location, which was from the north and south made up of steep and inaccessible crutches. The massive castle fortifications surrounded the entire top plateau.

Until now, only the ruins have been preserved, which gradually coincide with the surrounding nature. With the naked eye it is possible to observe the remains of masonry, foundations, staircase or ditch carved into the rock, behind which parts of the barbacan and the tank are hintedly reconstructed.

Visiting the castle ruins is ideally connected with the ascent to Sitno Hill. There are several exit routes. The shortest and steepest route of the route leads from Počúvadlianske Lake (about 3.5 km). Less steep trail along the green trail leads from Banska Štiavnica (about 10km), but there are other marked trails from the surrounding villages too.