Located on Mission Hill in Shek Kip Mei, the Ex-Sham Shui Po Service Reservoir is a Romanesque cistern featuring granite piers, red brick arches, and concrete cove ceilings. With a storage capacity of 9,900 cubic metres, it was built in 1904 to service residents of Kowloon Tong, Sham Shui Po, and Tai Hang Tung. The historical site was discovered in 2020, and in 2021, the Antiquities Advisory Board recognised it as a Grade 1 historic structure. Visitors can see the historic structure without prior appointment from 1 August 2024. You may also join the guided tour launched by the Water Supplies Department to learn more about the water supply history in Hong Kong.