Authorities say an Avalon, Pennsylvania, woman trying to take photos at the top of a Pennsylvania waterfall fell about 30 feet and suffered serious injuries. A ranger at McConnells Mill State Park in Slippery Rock Township said the woman was apparently at the top of Kildoo Falls, trying to take pictures, when she slipped and fell around 7:20 p.m. Sunday. Emergency responders called to the Lawrence County park rappelled down about 60 feet to reach the victim and get her back up the hill. The woman was flown to a local hospital with what were described as “very serious” injuries. Rangers have urged visitors to stay on marked trails while in the park.