A number of local governments, businesses, and research institutions have discussed the usefulness and importance of "green networks" in recent years. However, most green sites are still perceived as isolated distributed patches, thereby potentially leading to their underuse and little awareness of their importance. We propose a participatory environment that can visualize connections of green sites based on the levels of visible green using celestial sphere images contributed by citizens. The system combines existing green coverage maps and smartphone-based image capture tools to show "green routes" in a city. We expect that the proposed approach can increase the networked uses of green resources, thereby increasing the awareness of green networks and potentially leading to collective efforts towards the development of richer connected green in cities.