A tarn is a small mountain lake or pond, often formed by glacial activity. These bodies of water are typically found in high-altitude areas, nestled in depressions or basins created by glaciers. Tarns can vary in size and depth, and they are usually fed by melting snow or rainfall. Tarns are often surrounded by rocky terrain and can be quite picturesque, making them popular spots for hikers and nature enthusiasts. They provide unique habitats for various plants and animals, contributing to the biodiversity of their ecosystems. Many famous tarns, such as those in the Lake District of England, attract visitors for their scenic beauty.