Ipolytarnóc (Slovak: Ipeľský Trnovec) is a village in Hungary, Nógrád county.

Sometimes referred to as the "Prehistoric Pompeii", Ipolytarnóc is the location of 23 to 17 million year old fossils.

This is one of the world's richest complex fossil footprint find sites.

The site became protected in 1944 and is managed by the Directorate of the Bükk National Park.

The site provides several day-long programmes, including guided tours along its geological study trail and 4D movies about the prehistoric past in its Visitor Centre.