Errigal is a 751-metre mountain near Gweedore in County Donegal, Ireland. It is the tallest peak of the Derryveagh Mountains and the tallest peak in County Donegal. Errigal is also the most southern and the highest of the mountain chain called the "Seven Sisters" by locals. Wikipedia
this Irish bookshop has been closed during covid. I don't know if it will open again but I hope so. If you wish to study the language, this is where you can get everything you need to get started.