The word for this structure is apparently a menhir: https://en.wikipedia.org/wiki/Menhir https://en.wikipedia.org/wiki/Menhir. The article calls it the tallest

The word for this structure is apparently a menhir: https://en.wikipedia.org/wiki/Menhir https://en.wikipedia.org/wiki/Menhir. The article calls it the tallest in the UK but its Wikipedia page calls it the second-tallest. This is the actual tallest, interestingly also in Yorkshire: https://en.wikipedia.org/wiki/Rudston_Monolith https://en.wikipedia.org/wiki/Rudston_Monolith.