Kelimutu is essentially a volcano, at 1639 above sea level. Located on Flores Island in eastern Indonesia, the interesting thing about this volcano is its three crater lakes that are filled with volcanic liquids. These fluids give distinct colors to crater pools. When I say different colors, I don't mean different shades of the same color - I actually mean three different colors. Usually they are found in red, blue and green colors, but what is surprising is that these lakes change color periodically and constantly. What I might have seen as blue would be green or black the next time one of you visits.
WHY THIS PLACE
While modern science provides a logical reason for the ever-changing colors of the three crater lakes, locals have their own reasons to believe why this phenomenon occurs. They believe that the lakes are a sacred resting place for departed souls. They believe that depending on the age at which a person dies, their soul enters one of these lakes.
The periodic color change is due to the complex reactions of minerals and sunlight in these lakes.