This June 7, 2015 photo, signs line the trail at Crabtree Falls, warning visitors not to stray from the path due to slippery rocks in Nelson County, Va.  At least 30 people have died at Crabtree Falls in Nelson County since the U.S. Forest Service began tracking the incidents in 1982.  (Autumn Parry/News & Daily Advance via AP) MANDATORY CREDIT
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