Peyto Lake has some of the clearest, bluest water on the planet thanks to being fed by a glacier. The lake lies within Banff National Park, the oldest national park in Canada.
Located in southwestern Guatemala, Lake Atitlán sits nearly 5,000 feet above sea level. It formed due to a volcanic eruption about 84,000 years ago, and its backdrop still features volcanoes today.
Crater Lake is an iconic landmark of Oregon, sitting among the Cascade Mountain Range. The deepest lake in the United States, it is fed by rain and snow, leading to its remarkable purity.