The Kelimutu crater lakes are a mystery all their own. Sitting at the top of the Kelimutu volcano in Indonesia, each of the three water bodies is a different color. ... To be precise, the other two lakes are: Lake of Old People, or Tiwi Ata Mbupu, and Lake of Young Men and Maidens, also called Tiwu Nua Muri Kooh Tai.