Tarns are small mountain lakes that are typically found in areas of high altitude. While often associated with the moorlands of Northern England, tarns can be found throughout the world, wherever there are mountain ranges. Synonyms for tarns can include words like alpine lakes, corries, cirques, glacial lakes, and kettle ponds, among others. These terms may be used to describe different types of small mountain lakes, depending on their size, shape, and location. Regardless of the synonym used, tarns are always notable for their beauty and their important role in the high-altitude ecosystem.