So for all of my knowledgeable Irish friends: suppose I were to take a week off with the family and

So for all of my knowledgeable Irish friends: suppose I were to take a week off with the family and head up to some secret base up in the far north of Donegal, what are the things that I should make sure not to miss?

And then, just apropos of nothing at all, have a photo of an manhole cover, through which you can enter the earth, to inspect it's inner workings...