This is an ancient ring fort from the Iron Age 1700 BC and is located in Co. Donegal on the Inishowen peninsula near the town of Letterkenny. (That's my plug for Irish Tourist Board ) I came upon it just after a rain shower.
Thanks Rob & Miles,
This is my first neg. scan and I'm not sure that I got it right. Overall the photo such be darker. I have a better version on dublincameraclub.ie in the gallery section. I just don't know how to change the existing shot on display.
Rob I'm intrigued how you knew the translation of photo title.