If you're looking for an interesting experience and a chance to experience "walking meditation" look for a labyrinth to walk. Unlike a maze, you won't get lost while walking - all you have to do is keeping moving and you will reach the center. Mentally refreshing and physically rejuvinating are common experiences, as well as triggering insights into life's problems.
I used to have a 30 foot diameter 7 circuit labyrinth in my backyard (which my JW neighbor refused to even look at). I have also constructed the more elaborate 11 circuit labyrinths. Lots of stuff out there on the net if you are interested.