Lake Dominica: The Boliling lake, in the Edges the temperature is 180 Fahrenheit

Boiling lake in Dominica is filled with bubbling superheated water that is enveloped in a vapor cloud. It is between 180 and 197 degrees Fahrenheit on the edges alone and
will kill you in minutes. It is actually a flooded fumarole, a crack through which gases from molten lava below escape.

The basin collects rainwater, and there are two streams which also empty into the lake, as well as groundwater seeping up through the hot rocks. For visitors, a slip here is really going to be a fall to one's death.