This one-tile expansion comes with two tiles: One for the traditional version of Carcassonne, one for the current version; designed by the respective artists Doris Matthäus and Anne Pätzke. It's found in the "Spiel doch!" magazine from the W. Nostheide Verlag.
The Labyrinth tile connects up to four separate streets and combines them to one street. Part of the Carcassonne series.