The beauty of a labyrinth (often confused with a maze, which has many paths and dead ends) is that a labyrinth is a single winding path that leads from the entrance to the centre and back out again.
It is an ancient universal archetypal pattern that has been found in almost all cultures all over the world. The history of labyrinths dates back more than 5000 years.
All labyrinths are unicursal, meaning they only have one path, which makes them a perfect place for an Alzheimer sufferer to 'get lost in'.
See more at: http://tinyurl.com/gardenlabyrinth