Kelimutu is a volcano that consist of 3 lakes that are strikingly seen at the summit of the mountain. The three lakes periodically change its color mostly into blue, red, and brown. The changing of the color scientifically believed to be caused by the changing reaction of the mineral that contains in the lake that are perhaps by the gas of the lake. In the local perspectives, the color changes represents the social situation alarm which may happen in the future. The colors make this mountain lakes become very interesting and remain one of the most popular visited place during their stay in Flores.

Among the locals, the three lakes has their own names. Tiwu Ata Mbupu (Lake of Old People) is usually blue and is the westernmost of the three lakes. The other two lakes, Tiwu Nuwa Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched or Enchanted Lake) are separated by a shared crater wall and are typically green or red respectively. Each of the lakes represents its own meaning and has long been believed to be the most mystical place for most local people who live in the area of Ende.