Beehive stones or beehive rocks of Hungary are rock formations, often naturally conical towers, with niches or cavities carved into their sides. A limited number of rocks with niches can be found even close to Budapest, in the area of the Pilis mountains and the Budai-hegység hills, especially on its Tétényi-fennsík plateau. However, the city most densely surrounded by such formations is Eger, in the Bükkalja area (which lies between the valley of the Tarna stream and the valleys of the Hejő and Szinva streams).