She left the palace with one maid, and as she crossed the doorway something happened to her, but by what means it happened would be hard to tell; for in the one pace she passed out of the palace and out of the world, and the second step she trod was in Faery, but she did not know this. Her intention was to go to Cluain da chaillech to meet Crimthann, but when she left the palace she did not remember Crimthann any more. To her eye and to the eye of her maid the world was as it always had been, and the landmarks they knew were about them. But the object for which they were travelling was different, although unknown, and the people they passed on the roads were unknown, and were yet people that they knew. They set out southwards from Tara into the Duffry of Leinster, and after some time they came into wild country and went astray. At last Becfola halted, saying: "I do not know where we are." The maid replied that she also did not know.
James Stephens from Irish Fairy Tales