There’s so many fascinating and historic things to see and do in London, it’s hard to prioritize them. But I’d put watching this event towards the top of the list, as the changing of the Queen’s Guard at Buckingham Palace is worth seeing if you’re in the city a few days.
Many countries have a “Changing the Guard” ceremony, but England’s is the most elaborate I’ve ever seen. It is a ritual involving a new guard guard exchanging duty with the old guard. There are several regiments involved in the ritual, and the interested reader is refered to the British Monarchy website for more detailed information.
The ceremony occurs most days between around 11 am and noon. Check the formal schedule before you go to make sure you won’t be disappointed as it is not held daily in the off-season. Be sure you arrive very early if you want a good view.
You can see and learn more about the Changing of the Guard by watching this video link: