Located on the Thames foreshore at Bankside, between The Founder’s Arms and Blackfriars Railway Bridge, London.
There used to be a hydraulic power station above this part of the river wall so these are possibly related.
"In front of the old power station water inlets may be seen which could have been part of the power station’s water supply or could have been used for hydraulic cranes", Thames Discovery: https://twitter.com/ThamesDiscovery/status/1308086146556219393
659 photos taken in September 2020 with a Sony a6000 and processed in Reality Capture.