1
Rare prehistoric rock art, believed to be at least 4,000 years old, has been discovered on a portal tomb in north Co Sligo.
2
Specifically, a number of perfectly preserved portal tombs or dolmens are located in this area.
3
They break into four basic classes: court tombs, portal tombs, passage tombs and wedge tombs.
4
It links to the Brennanstown Portal Tomb dating from 2,500-2,000 BC.