The formations of Castle Hill and the gorge in Szarvaskő are basalt lava flows and pillow lava clusters that flowed down the slopes of submarine volcanic cones. Looking down from Akasztó Hill, we can see that the lava "pillows" formed clusters and slid down the former slope in different directions.
The spectacular gorge of the Eger Stream, 5–20 m high and lined with basalt bodies, may have formed at the end of the late Pliocene, about 2–3 million years ago.
The ruins of the former castle stand on the top of Castle Hill.
The Castle Hill in Szarvaskő and its surroundings are a highly protected area.
The nature trail presenting the surroundings of Szarvaskő is open to the public.
