Glacial lakes are bodies of water formed by the melting of glaciers. As glaciers move, they carve out depressions in the landscape, which can fill with water when the ice retreats. These lakes can vary in size and depth, and they often have clear, blue water due to the fine sediment left behind by the glacier. Many glacial lakes are found in mountainous regions, such as the Rocky Mountains in North America and the Himalayas in Asia. They play a crucial role in the ecosystem, providing habitats for various species and serving as important water sources for nearby communities.