Tiwu Ata Mbupu is a stunning crater lake located on the island of Flores in Indonesia. It is one of three lakes in the Kelimutu volcanic complex, known for its unique color changes, which can range from blue to green to black. The lake is considered sacred by the local Ngada people, who believe it holds spiritual significance. The area surrounding Tiwu Ata Mbupu is rich in biodiversity and offers breathtaking views of the surrounding landscape. Visitors often hike to the lake to witness its beauty and experience the cultural heritage of the Ngada community. The lake's changing colors are attributed to volcanic gases and mineral content, making it a fascinating natural phenomenon.