10. Marvel at the lakes of Kelimutu, Flores
Kelimutu is the name of a volcano in central Flores which has three crater lakes located within it. The lakes are famous for their differing colors of blue, red, and green, thought to be triggered by continued volcanic activity and gases beneath the surface of the water. Many visitors choose to visit the lakes to witness this natural phenomenon or to hike to and sleep near the volcano to watch the sunrise over the crater.