A curious rock formation ...

There are so many things, here in Italy, that poke my curiousity something fierce ... this rock formation was surely one of them.

Is it volcanic?  And I liked the way the green and yellow plant kind of copies the chaos of the black and white rock spewing out of the hillside.

Here, I find I need both a geologist and a horticulturalist to walk with me.  There are plants I need to know the names of, and a pharmacist too, as I have had this explosive allergy/hayfever thing going on these last 24 hours.