Carbis Bay menhir
SW530382 – Ian McNeil Cooke’s ‘Standing Stones of the Land’s End’ (1998 – Men-an-Tol Studio) says “this somewhat misnamed longstone, a cut down stump with drill marks on one side, stands by a bus stop on the St.Ives road and gave its name to the locality”. It’s now about 1.5 m tall and stands on the Southern outskirts of Carbis Bay.
The other stone that Windago mentions below (approx SW525372) is called the Beersheba menhir, and I’ve added it as a site