Nelson's Monument
Edinburgh
4 July 2007
Nelson's Monument is a tower on Calton Hill, commemorating Admiral Horatio Nelson (who is also celebrated with Nelson's Column in Trafalgar Square, London). There is a time ball at the top of the tower, which is raised to the top of the mast and dropped at precisely 12:00 Greenwich mean time. In the summer, this coincides with the one o'clock gun that is fired from the castle. Both the time ball and the gun were intended to allow passing ships to set their clocks.