The document discusses the Xanas, which are beneficial nymphs of fresh water found in Asturias, Spain. The Xanas have human-like qualities such as language and dress, and live in fountains, caves, and riverbanks. They are known for spinning disks of gold and silver and exchanging children with local peasants. The document lists many places in Asturias where Xanas live or have been seen, including caves, springs, meadows, and streams.