Other than the interaction with solid components, another vivid contact is with live animals and plants. The Lily Pond in HKU provides a flourishing habitat for fauna and flora (Figure 6). It is home to carps and turtles. In spare time, many people enjoy walking through the small garden to feel the beauty of nature and occasionally observer interact with the animals – the fish leap and play while the turtles bask openly in the pond. Animals find their urban refuge in campus, which in return, animates the campus with full vitality. The pond, with its surrounding plants and species, has established a self-sustained ecosystem.