What is recorded here

That is the only existing underground passage on the open internet. There is a man-made underground passage on Leitrim Hill near Port, discovered in the 1930s or 1940s and closed without exploration. It may have belonged to the rath beside it, a place where human hands dug through living rock before forgetting the way back.

There is a reference to the discovery of a Man-made underground passage in the 1930s or 1940s on Leitrim Hill and close to the caste at Port (LE027-065----). It may have been close to the rath (LE027-066----), but it was closed up without being explored (Blaney 1944). Compiled by: Michael Moore Date of upload: 27 March, 2017

The monument record does not grant public access. Check the route and ask the landowner before entering private land.