It always amazes me when I see healthy growing olive trees with large holes at ground level such as this one. I found it in an old and unmaintained grove in Villeneuve Loubet but there are numerous examples to be found all over the place - in fact I thought I had another example in the Olive Tree Blogging archives somewhere but I can't find it so maybe not. As always click on the image if you want to see it in greater detail.