A Second World War concrete anti aircraft tower located on the east bank of the Lee Valley Navigation canal, directly east of Cheshunt Station car park. "The tower was designed to raise a 40mm Bofors gun ... in order to achieve an all-round field of fire": https://historicengland.org.uk/listing/the-list/list-entry/1021000 Date: 1940. 2501 photos taken with a Sony a7R III and 353 with a DJI Mini 3 (by Brian Roberts, thedronedetective) in May 2023 and processed in Reality Capture.