Finding the SourceKrakle in Un'Goro Crater wants you to find the hottest area of Fire Plume Ridge.
Whenever you find a hot spot, right click the thermometer to check the temperature. Keep looking until you find the hottest one.
|Find the hottest area of Fire Plume Ridge [Temperature Reading]|
I'd go there myself, but... I'm a little scared of the fire elementals there!
Yes, I definitely see the correlation here between the temperature of the volcano and the hot springs. I'll have to double-check my equations for accuracy, but it seems like the distance and the rate that the heat is transferred... Hmm...