This peaceful, purple-tinted lake is located near the Painted Hills of Wheeler County, Ore. The mauve shades of the lake's shores come from iron oxides and other mineral particles that have trickled down into the water from the colorful hills.
This black lake is located in a volcano crater in Flores, Indonesia. Its water fills the old cone of the still-active Kelimutu volcano, and the lake gets its mysterious, onyx appearance from volcanic ash particles that seep into the water from below.
Croatian LakeCredit: CCat82 | shutterstock. This stunning lake rests in the Croatian forest of Plitvice. It is part of the Plitvice Lakes National Park, which also contains breathtaking waterfalls and is the oldest national park in Southeast Europe.