Tiwu Ata Bupu is one of the three main crater lakes located on the island of Flores in Indonesia. It is known for its stunning blue waters and is situated near the town of Moni. The lake is part of the Mount Kelimutu National Park and is a popular destination for tourists seeking natural beauty and cultural significance. The name "Tiwu Ata Bupu" translates to "Lake of the Old People" in the local Tetun language. This lake is believed to hold spiritual significance for the local Lio people, who view it as a resting place for the souls of the deceased. Each of the three lakes in the area has its own unique color and cultural meaning.