A log that has been bored to create a pipe, located on the Thames foreshore just east of Southwark Bridge on the south bank, London.
According to Thames Discovery Programme:
"These were common in London in the 16th & 17th centuries. They were replaced by ceramic and later iron pipes. Drains like these show where property divisions existed as they tended to derive from gutters at either side of those divisions"
https://twitter.com/ThamesDiscovery/status/1308080515686240261?s=20
183 photos taken in July 2021 with a Sony a6000 and processed in Reality Capture.