An AC can't reach from Mythic Europe into Faerie, because there is no way to synchronize mundane time and time in Faerie (RoP:F p.30 Warping and the Passage of Time): you can't arrive from Mythic Europe in the middle of the story another character experiences in Faerie, and that character can't escape his story to Mythic Europe via an AC either.
The Twilight Void (RoP:M p.24ff) also is outside the time of Mythic Europe, and the time a traveler experiences there depends on his Twilight Comprehension roll and the choices he makes.
The accessibility of the Infernal Realm is (RoP:TI p.9 box One Way Trip?) left for troupes to limit.
Cheers