Portal map for Passage No.1
The position of the icon shown above was derived from coordinates provided by Ordnance Survey Ireland when the portal's location was originally plotted on maps hosted on its website. In case of inaccuracies during the data conversion process for using Google aerial imagery, a link to the relevant map is provided on the left. Select 'Historic 25"' in the 'Preview Map Series' menu to see the tunnel more clearly.

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