At Atmospheric Road, at intersection with Barnhill Road.  So what is an atmospheric railway, and how come Kingstown had one?

[09] Quarry

This is an 11-stop audio guide to the popular walkway from Dún Laoghaire to Dalkey Quarry, known locally as "The Metals",
It's not just a journey through fascinating engineering and social history.  It's also an eye-opening excursion along a unique living piece of local heritage.
Join architectural historian Rob Goodbody, author of "The Metals", and producer Aileen O'Meara back to the days when Dún Laoghaire just a small fishing village surrounded by rocky outcrops, and hear the fascinating story of how engineers designed this unique trackway that shaped the development of this marine town and its fine harbour.