One of the favorite attractions for tourists - the changing of the guard at Buckingham Palace.
On regular days, at 11 o'clock, you can see the changing of the guard at Buckingham Palace. Tourists from all over the world come to watch the play. Seeing what is happening in the palace courtyard is challenging because the tourists are standing on the fences. Still, you can stand in all the surrounding areas, where it is much less crowded, and watch the guards pass by, with the orchestra and according to all the rules of the ceremony.
Worth it for anyone coming to London for the first time.