Alfheim "The Homeland of the Elves” is, as the name suggests, the world inhabited by the elves, a class of demigod-like beings in Norse mythology. Despite being one of the Nine Realms in Norse myth, Alfheim is never described in the sources that form the basis of our current knowledge of Germanic religion, but is rather merely mentioned in passing in a few places.
Alfheim is generally depicted as being a realm of true beauty not unlike Heaven itself. It is the true abode of both fairies, elves, pixies, and Sprites. It is there that these beings of light can freely roam about and perform harmless mischief while performing about their duties in their daily lives. It is said to be one of the more peaceful worlds in the Nine Realms of Norse cosmology.
However, the elves are described as being luminous and “more beautiful than the sun,” so one can assume that their homeland was a gracious realm of light and beauty. Although the realms that comprise the Nine Worlds of the Norse cosmology are never listed, it seems highly probable that, given the prominence of the elves in Germanic religion, Alfheim was one of them.
The Vanir god Freyr is said to be the ruler of Alfheim, however, the relationship between the elves and the Vanir is highly ambiguous and involves considerable overlap between the two groups. Freyr’s position as lord of Alfheim, therefore, while hard to interpret with much precision, should not be entirely surprising. However, it is also stated that Alfheim is often the land ruled by the "Queen of Elves," and thus anything from Alfheim.