poisoned glen

Gweedore to Letterkenny and the Poisoned Glen.
Just outside Gweedore is the famous Mount Errigal, the Ulster Way path passes by the mountain and leads into the Derryveagh Mountain range.
At the eastern edge of the range is Glenveagh National Park, which is  a protected environment for the deer that roam the isolated hillsides that descend to Glenveagh Castle, now an exhibition centre for the park.