Tana, the vast, 832-square-mile body of water is Ethiopia's largest lake and is packed with ecological, cultural and historical charm. It is situated in the highlands of Ethiopia’s second-largest region, Amhara administrative state. The lake is one of Africa's most unique wetland ecosystems and the source of 50 percent of Ethiopia's freshwater. UNESCO designated Lake Tana as a World Heritage site for its unique ecological biosphere reserve in June 2015. Tana is also home to historical monasteries and churches. Their relatively isolated location on islands has aided their preservation, but the lake has been infested with water hyacinth, a fast-growing invasive water weed native to South America and locally known as Emboch. As the menacing water hyacinth threatens to clog the entire lake, their survival is at stake as well as the livelihoods of all who live near and depend on Lake Tana as a natural resource.