Tomb with a view, Loughcrew, Ireland.
An extraordinary group of prehistoric passage graves, the Loughcrew Cairns are some 5,000 years old. Visiting them with the hearty folks from my Shamrocker tour, we were all respectfully impressed with the ancient mystery of the place.

Look here for a view of the surrounding countryside (they say that 17 midland counties can be seen from this hilltop).

A photo of shamrocks I found at this site is here.