Labyrinth of Gedref (maze)

The Labyrinth of Gedref is a sprawling hedgemaze that served as Arthur Pendragon's final test for lifting the curse of the unicorn.

The exit of the maze opens out onto a rocky shoreline where Arthur finds a table holding two cups. Merlin is already seated at the table, and Anhora explains that one cup contains water, and one contains poison, that all of the liquid must be drunk, and that Arthur and Merlin may drink from only one cup each. (The Labyrinth fo Gedref)