Scientists from Australia's University of Adelaide have identified a lake so pristine that they're calling it "God's bathtub."
Although typical freshwater ecosystems vary because of climate change and man's influences, Blue Lake on North Stradbroke Island in Queensland has remained largely unchanged for 7,500 years, according to a recent study.
The water is so clear researchers could see to the bottom -- 33 feet below.
"It's like God's bathtub," Cameron Barr, a researcher at the university and the study's lead author, told the Australian Associated Press (AAP). "It is beautiful. It is absolutely beautiful."