Phantom Pyramid Mountain, Mount Rocciamelone, Susa Valley, Italy

Adventurous photographer Roberto Bereto climbed to the summit of Mount Rocciamelone in the Italian Graian Alps 25 times to capture his astonishing images of the mind-boggling sight. After spotting the trick of the light for the first time, the 43-year-old, from Rivoli in Turin, became committed to making the three-and-a-half hour journey as often as he could.
He has now collected an impressive collection of photos of the shadowy double mountain, all taken at sunset from 3,538 metres up. On some occasions he would be thwarted by the cloud, but on others he would capture the perfect spectacle.
Mr Bereto, a professional musician, originally noticed the beautiful illusion while on a camping trip in the area. His two day trips - usually alone, but sometimes with his partner - follow the same routine of watching the sunset, followed by the stars and then the sunrise. His aim was to catch a shadow falling across a valley, which creates the spectacular illusion of an extra mountain appearing on the horizon.