The abandoned narrow-gauge railways of Donegal

This is wonderful stuff. As the blurb on YouTube explains:

Donegal was once served by 225 miles of narrow gauge 3' 0'' railways but of this nothing survives, apart from the three mile long Fintown Railway. In July 2014, while on holidays in Donegal, I visited many of the old railway sites hoping to capture some of these locations on camera, before they disappear forever.

And it goes on to identify the sites visited in the video.