A conduit house above a reservoir ( which was part of a system of conduits under Greenwich Park) that supplied water to the Royal Hospital for Seamen (now the National Maritime Museum).
This building is located on the west side of the park near the junction of Crooms Hill and May's Buildings Mews, Greenwich, London.
Attributed to Nicholas Hawksmoor.
Date: Late 17thC or early 18thC.
Historic England listing: https://historicengland.org.uk/listing/the-list/list-entry/1393455
More info in this blog by Running Past: https://runner500.wordpress.com/tag/greenwich-hospital-standard-reservoir/
827 photos taken in November 2020 with a Sony a6000 and processed in Reality Capture.