Kelimutu is also of interest to geologists, because the three lakes have different colors, yet are at the crest of the same volcano. According to Kelimutu National Park officials, the colour changes as a result of chemical reactions resulting from the minerals contained in the lake perhaps triggered by volcano gas activity. However, it is more accurate to refer to the color changes as being driven by oxidation-reduction chemical dynamics. Kawah Putih lake in West Java, south of Bandung, is another crater lake in Indonesia with some similarities to the lakes at Kelimutu.