Oweynagat, the Cave of the Cats
Rathcroghan, County Roscommon
Oweynagat is a narrow cave at Rathcroghan, the ancient royal seat of Connacht. In legend it was the entrance to the Otherworld, from which monsters, birds and wild pigs poured out every Samhain, the festival that became Halloween.
Read the full story, see it on the map, get directions and find what else is nearby in the free Hidden Britain Atlas map.
- When
- Ancient
- Where
- 53.8030, -8.3070
- Group
- Caves & grottoes
Visiting
Guided tours from the Rathcroghan Visitor Centre in Tulsk.

The Ledger of Lost Britain
The Romans arrived in AD 43. For most people that is where the history of Britain begins. But by the time the legions landed, people had already been living on these islands for thousands of years. They had hunted, farmed, mined flint, dragged stones across the country, raised a hill by hand, and buried their dead in great tombs. They left no written words. What they left was the ground itself. Every place in this book can be visited, or has been dug up, or is in a museum.
Nearby mysteries
- Lady Betty, the HangwomanExecution site · Roscommon · 13 miles away
- The Caves of KeashCave or grotto · Keshcorran, County Sligo · 19 miles away
- The Lough Ree MonsterDragon or monster · Lough Ree, County Roscommon · 25 miles away
- Gallagh ManBigfoot & Hominids · Near Castleblakeney, County Galway · 26 miles away
- Tobernalt Holy WellHoly well · Near Sligo · 31 miles away
- KnocknareaLegend · Near Sligo · 33 miles away