Hegyestű is a special geological site in Hungary, north from Lake Balaton in the Kali basin. The volcanic area is one of the most spectacular sites, not only in Hungary, but even in Europe. The basaltic monolithic was formed by a volcanic eruption about 3,5-4 millio years ago.
Really a beautiful and interesting place with an amazing view :)
More information about Hegyestű you can find here.