I've just worked my way through the 4th story of my little folklore book, and there were a few things that I wasn't sure about in this last story.
Can anyone translate these?

Ard na Caithne (it's a place-name)

Lios Chathair Léith (another place-name)

Do bhain sé an baile amach.

Sin a bhfuil. Go raibh maith agaibh.

Ard na Caithne = Arbutus Heights or High Place of the Arbutus
I have no idea what an arbutus is, except that it's a kind of tree/bush, and FGB has úll caithne as "arbutus berry".

Lios Chathair Léith
lios and cathair can each mean "stone fort" (and lios can mean just "stone" or even "mound"). Not sure whether the third word is a name (as in Lios Lochlainn) or means "flat", "half", or "grey". There are lots of places (especially townlands) named with lios and a color: Lios Buí, Lios Dubh, Lios Liath, etc. So, perhaps it is "Mound of the Grey Ring Fort" or something like that.

Do bhain sé an baile amach = He reached the town

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I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.

Logainm (http://www.logainm.ie) gives:

​Ard na Caithne Smerwick (Kerry)

No Lios Chathair Léith listed as such, but An Chathair Léith Caherlea (Kerry) (though there appear to be others in other parts of the country as well.)

Lios ~ would be a likely name for a local stone fort there.

As Caoimhín said, bain ~ amach is "to reach a place".

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Múinteoir Gaeilge - Irish Teacher
My "specialty" is Connemara Irish, particularly Cois Fhairrge dialect, but I can also speak Ulster and Munster Irish with native-level pronunciation.
Is fearr Gaeilge ḃriste ná Béarla cliste, cinnte, aċ i ḃfad níos fearr aríst í Gaeilge ḃinn ḃeo na nGaeltaċtaí.
Gaeilge Chonnacht (GC), go háraid Gaeilge Chois Fhairrge (GCF), Gaeilic Uladh (GU), Gaelainn na Mumhan (GM), agus Gaeilge an Chaighdeáin Oifigiúil (CO).

Thanks for the help, Caoimhín and Breandán!

I didn't know (until now!) if he reached the town, or he reached home.

If anybody happens to know what the word Léith means in this case, please let me know.

léith is genitive singular for liath

Sorry - meant to add

gray stone fairy fort on Western Dingle peninsula which is the remains of a stone ringfort. I seem to remember it being on the south side of the peninsula, west of Dingle, but it has been a while since I was there. It could be by Dun Caoin or Baile an Fhéirtearaigh.