Sirok Castle
As this castle was built on top of an old volcano, the hiking trail to the most significant castle ruin of Mátra also includes steep routes, but it’s well worth the effort, because Sirok Castle is amazing and the panorama from the castle is unrivalled. The fortress, which is located right between the forests of Bükk and Mátra, was carved into an enormous rock. You can explore the mysterious dungeon network created inside the hill of rhyolitic tuff, so you can wander the whole area of the ruin. Its unique feature is the permanent exhibition of Sirok Castle, not displaying the everyday life of the Hungarian border castle soldiers, but instead preserving the memory of the Ottoman castle guards living here at the beginning of the 17th century.