You can see from my pictures that's it's in the middle of a field of limestone.
Here's the wikipedia article.
By the way, I wouldn't call Caherconnell much of a place!
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On the south side of Fourvière are the (partially intact) ruins of a Roman Theatre (15 BC), only rediscovered in the 20th century, and now home to a museum and a series of concerts and operas throughout the summer, and the ruins of vast Roman Baths.The Bird's eye is here. My pictures begin here.