Cruachan started off in the early '90s with a desire to integrate the folk music of their homeland into the metal they enjoyed, and they did so by putting together folk with black metal, two genres that mix surprisingly well (see: Ensiferum, Enslaved, Einherjer, Finntroll, etc), and the few reviews of their first album, Tuath Na Gael, that I have read say that it is one of the better examples of folk