From volcanoes to drones: Nat Geo's travel photo contest opens for entries

The main image photo (above) was the overall winning entry of the 'People' category last year. Taken by the Turkey-based photographer F Dilek Uyar, the photo was taken in Konya. "The 'dance' of the Whirling Dervishes is called Sema and is a symbol of the Mevlevi culture," Uyar wrote. "According to ...