If you're planning a tropical getaway to Indonesia, you can soak up creativity in the artist community of Ubud, go surfing on the beaches near Kuta, or visit the temples in Denpasar. While Indonesia is also home to one of the world's off-limits tourist attractions, you can use some of your time to take a day trip to Flores Island, home of the majestic Kelimutu Volcano. The volcano hasn't erupted since 1968, and it has three magnificent crater lakes at its summit. You may have seen crater lakes before, but Kelimutu stands out because its lakes glisten with colors that change regularly. Depending on when you visit, you might see a black, red, or brown lake. Alternatively, it might have multiple shades of blue, green, turquoise, and teal.
Kelimutu's crater lakes are not the only richly colored lakes in the world, but their colors aren't as easily explained, because they change so often. Many lakes get color from specific species of algae or bacteria. One possible explanation for Kelimutu's crater lakes is that the minerals in the water create different hues when they interact with volcanic gas. Fumaroles, volcanic vents releasing sulfur dioxide and other gases, may cause the waters to mix so mineral-rich water rises to the surface, resulting in stunning colors.
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