Álfheimr, in Norse mythology, is one of the Nine Worlds and is known as the realm of the elves. It is often depicted as a beautiful and luminous place, inhabited by light elves, who are considered benevolent and wise. This realm is associated with nature, magic, and the beauty of the natural world. In the cosmology of Norse mythology, Álfheimr is ruled by the god Freyr, who is associated with fertility, prosperity, and fair weather. The light elves of Álfheimr are believed to have a close connection to the Aesir and Vanir, the two main groups of gods in Norse belief, highlighting the importance of this realm in the broader mythological narrative.