Source: Swissinfo - Unknown natural wonders of the world - a homage to the "gentle giants" - Michel Brunner, a graphic artist and author of "Giant Trees of Switzerland", has been measuring and photographing giant trees in Europe for more than ten years. He has listed more than 2,000 trees, of which more than 1,000 are in Switzerland. (Photos: Michel Brunner and André Hübscher; selected by Rolf Amiet, swissinfo.ch)
