The artists we talked about who viewed walking as art reminded me of the sacred labyrinths I saw last summer at a monastery in Prague.
They come in three basic designs- seven-circuit, eleven-circuit, and twelve-circuit.

Labyrinths have been around for over 4000 years, and have been found in Native American, Greek, Celtic, and Mayan cultures. During the Crusades they were used to symbolize the path to salvation, while some cultures used them to symbolize the Earth. Unlike mazes, which have many dead ends and are meant to trick the person walking through them, labyrinths have only one path to walk and only one outcome, and no decisions to be made. They are used as a meditation tool- a person enters, walks to the center, and then walks back out. This type of walking meditation is sometimes known as "body prayer," although walking the labyrinth doesn't always have to be connected to religion- sometimes it's just used for clearing the mind, while some people enter with a specific concern they want to reflect on while they walk.

More information of the history of labyrinths can be found here.