▽National Geographic Photo of the Day ●04/14 13:07 Mountain Sanctuary April 14, 2016 April 14, 2016 Mountain Sanctuary Photograph by Giacomo Marchegiani, National Geographic Your Shot The Temple of Valadier welcomes visitors to a cave in the Frasassi Gorge in Italy’s Marches region. The eponymous structure, designed by Italian architect Giuseppe Valadier in the early 1800s, was to be used as a retreat for Christians seeking forgiveness, earning it