It doesn't take much in a humid climate for plants to sprout on the roof. An accumulation of dust and moisture provide fertile ground for seeds that travel in the wind or by our feathered friends. And these centuries old (at least 500 years) roof tiles are no exception. The medieval town of Beynac, France, perched high on a cliff, has plenty of places for plants to sprout.
"Roof Garden" © Kathy Dunham 2009
