On the andesite hummock towering above the village of Podhradie, there are ruins of a medieval castle called Sivý Kameň (ie Grey Rock). The castle was built in the first half of the 14th century as a royal castle. During its existence, it has had several owners and has gone through famous and difficult moments.

The Sivý Kameň Castle was conquered several times, looted and finally burned. Much of the ruins were dismantled as building materials by the local population. At present, only the very modest remains of the castle can be seen by the naked eye, indicating at least its size.

Nevertheless, the ruins of the castle are worth seeing. Located in an exceptional, quiet place, surrounded by beautiful nature. AJ is therefore this place ideal for undemanding tourism. The castle hill is visible directly from the village. An information board with the words "Sivý Kameň" will tell you the direction of hike. The whole climb takes about 15 minutes.