The remains of part of the launch ramp of Brunel's SS Great Eastern on the Isle Of Dogs, London. These remains are on the Thames foreshore and only viewable at low tide. They line up with the preservered remains in the park above.
https://www.historic-uk.com/HistoryMagazine/DestinationsUK/SS-Great-Easterns-Launch-Ramp/
Date: 1850s
Photos taken in May 2019 with a Sony a6000 and processed in Agisoft Metashape. Photos were taken from the embankment above (north) with a monopod and also from the pier of Masthouse Terrace to the west.