At the summit of Mount Kelimutu, there are three crater lakes in three different colors and those colors change all the time.
Mount Kelimutu is a volcano in Flores, one of the many volcanoes of Indonesia. The highest peak here is the Mount Kelibara of 1731m tall.
One of the most famous attractions here for travelers is the tri-colored Kelimutu lake within the summit of the craters at 1690m. It consists of three lakes together of varying colors from each other and also at different times, making them surreal and exciting to be discovered.
One of these lakes is Tiwu ata Mbupu (Lake of Old People) which is usually blue and on the westernmost of the three lakes. The other two lakes are Tiwu Nuwa Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched or Enchanted Lake), where both of them are green or red respectively and are only separated by a crater wall.
These lakes change color dramatically and unpredictably from blue or green to red or black, making it one of the natural phenomena to be beheld by many. Moreover, the precariously steep road to get there makes it so much more mysterious and mystifying.