Fantasy

I just wanted to discuss the subgenres of fantasy, which I think I've got a bit of a mixed-up intuition on.
High fantasy is fantasy set in an entirely different world, a "secondary" world. Low fantasy, by contrast, is set in this, the "primary", world. In contrast to sword and sorcery (below), the tales focus on world-endangering matters.
Sword and sorcery is the second subgenre commonly associated with the genre, which depicts much more personal conflicts than high fantasy, generally starring sword-wielding heroes.
However, fantasy encompasses any story with a fantastical setting, and has sister genres in science fiction and horror, the three of which differ only in their themes (the (pseudo-)scientific and macabre, respectively).