Lavernock Point, about 6 miles south of Cardiff, Wales

Mathematical Gazetteer of the British Isles


This was the site of some of Marconi's early wireless experiments in 1897: he transmitted to the island of Flat Holm (or Flatholm), 3 miles to the SE in the Bristol Channel.
See THIS LINK


The Mathematical Gazetteer of the British Isles was created by David Singmaster.
The original site is at THIS LINK.