Six elephants perish in Khao Yai’s ‘hell’s abyss’ waterfall By THE NATION     Prachi Buri National Park officials reported that no fewer than six wild elephants drowned after a group of the animals fell into Haew Narok Waterfall in Khao Yai National Park, Prachin Buri, Department of National Parks, Wildlife and Plant Conservation chief Thanya Netithamkul said on Saturday.   Video clip courtesy of   “On Friday October 4, off