Given that people love the quiet places in the park lands, a contemplative labyrinth could be a nice idea. its an ancient pathway design that people walk slowly along the ground that acts as a form of meditation which crosses many faiths. it could be good near the hospital a where people need to find solace from stress. there is one in centennial park, NSW.
Image source and credit: http://www.centennialparklands.com.au/things_to_do/centennial_park_labyrinth