This 16th edition, having for theme “The Four Element”, will allow to consider a retro-prospecting of our planet and a sight more aesthetic that scientific which won’t be limited however by a simple “state of places” but a dialogue between photography and natural elements. “The four elements” are a hypothesis voiced by certain philosophers of the antic Greece, hypothesis whereby whole of materials, which make up the planet are summed up by Fire, Air, Earth, and Water.