Noon's Hole (Sumera) – Arch Cave

Noon's Hole (Irish grid ref H12684431) lies about 5 km northwest of the centre of Boho, in the townland of Old Barr in the civil parish of Devenish, County Fermanagh, Northern Ireland, close to the border with Boho parish. The cave is under part of the escarpment on the east side of the Glenade Sandstone uplands. At , this pothole was thought to have the deepest shaft in Ireland, but this honour was passed to the nearby Reyfad Pot, which contains an entrance shaft of . The continuation of the cave system (incorporating the Afternoon Series and High Noon's) contains of passage, and it connects to the resurgence at Arch Cave through three cave dives, making this system the 8th deepest in Ireland, at .