Facial nerve canal
The Fallopian canal or facial nerve canal refers to a bony canal through which the facial nerve traverses the petrous temporal bone, from the internal acoustic meatus to the stylomastoid foramen. There are three segments of the canal, corresponding to the segments of the facial nerve they contain:
Two genua (anterior genu and posterior genu) are also present.
It is, for those of you fond of anatomic trivia, the longest bony canal through which a nerve passes in the human body.