I found his picture of Michel de Broin's 2004 sculpture very tranquil. Here's his description of the work:

Upon invitation to reflect on the notion of transparency, that led me into the forest to envelop the contour of a large stone with fragments of mirror.  The large stone, tucked away deep in the woods, became a reflective surface for its surroundings.  In this play of splintered radiance, the rock disappears in its reflections. Because it reflects, one cannot be misled by its presence, yet we cannot seize it, rather it is the rock that reflects us.