Chitwan National Park in Nepal is home to rhinos and elephants, both captive and wild.
The park uses captive elephants to protect the endangered rhino population. They walk miles each day with their mahouts, looking for signs of poaching.
When they're working, the elephants take full advantage of the jungle they patrol, browsing and grazing as they go. Until recently, however, the elephants had to be chained at night so they couldn't wander off and raid the crops of nearby villages.
But in 2013, the government of Nepal asked Elephant Aid International (EAI) and its founder Carol Buckley to build chain-free corrals at each of its 15 elephant facilities, which house a total of 63 elephants.
EAI constructed a one-acre corral for each elephant, using steel posts and high-tensile wire hooked up to a solar-powered energizer. The energizer emits a 10V pulsating current that is harmless to elephants but has proven effective at keeping them safely in their corrals.
Once released from chains, the elephants quickly realize they're free to explore, dust, browse – and play. Watch what happened after 57-year-old Laxmi Kali stepped out of her chains for the last time: Click here to watch the video