Killydrum (from Irish Coill an Droma 'wood of the ridge') is a townland in County Fermanagh, Northern Ireland.
[1] In the Ordnance Survey Letters of O' Donovan, the surveyor notes that (the virgin) St. Faber first attempted to build her church in Killydrum near the holy well, however the first days construction was destroyed overnight by an invisible being.
This slip was thought to be brought about by a genius or sheaver (shaver)who inhabited the river who did everything in his power to prevent the spread of Christianity in the region.
Once St Faber understood this she cursed the river with sterility of fish and fertility in destroying human life and may it run uphill with the following phrase MI-ADH EISC A'S ADH BAIDHTE AG RITH ANAGHAIDH AN AIRD GO LA BRATHA.
The area around the karst has been designated a provisional site of special scientific interest (PASSI) by the Department of the Environment (NI).