Flanking the eastern edge of the Serengeti, the site houses the Ngorongoro Crater – the world's sixth-largest intact volcanic caldera – and Olduvai Gorge. This UNESCO World Heritage site ...

Dwarfed by destruction, Allied soldiers look down into a blast crater made by a mine during the Battle of Messines. Photograph by Daily Mirror, Mirrorpix, Mirrorpix, Getty Images Among the waves ...