Can't remember the ship it came from- one of the hundreds of wrecks around here.
(The Shipwreck Coast)
The usually unseen internal grain structure of the iron here revealed by corrosion/ conservation- most astonishing!
According to the plaque this weighs 2 tonne and was raised by divers from the sea floor using 14
44-gallon drums of air. (Then what? 14 drums of helium to get it up the cliff?)
(Sailor's Tip for The Shipwreck Coast: the clue is in the name)