Which is the coldest body of water inland?

The coldest inland body of water is often considered to be Lake Vostok in Antarctica. Situated beneath the Antarctic ice sheet, it remains liquid due to geothermal heat, despite its frigid surroundings. The water temperature can be around -3 degrees Celsius (27 degrees Fahrenheit) due to the pressure from the ice above, which lowers the freezing point. This unique environment hosts microbial life, making it a subject of scientific interest.