Aside from being a breezy, scenic walk through nature, the 5km Tai Tam Waterworks Heritage Trail is also home to a piece of history. 21 pieces of history, in fact. Aqueducts, bridges, arches, and dams are just a few of the 21 parts of this pre-World War II water supply system which have been declared monuments. The waterworks were constructed between the late 19th century and the early 20th century to supply more water to the eastern side of Hong Kong island, and some of the structures are still working today. Walking the trail takes around two hours. Start at Wong Nai Chung Gap near Hong Kong Parkview, or the junction of Tai Tam Reservoir Road and and Tai Tam Road, and finish up at the Tai Tam Tuk Raw Water Pumping Station.