Buckingham Palace is an overwhelming building in London! I have been there many times as a tourist and I am always amazed by the variety of the city. But apart from the obvious sights, the city offers so much more that you wouldn't notice at first glance.
If you want to plan a successful city trip through London as a tourist like me, you can inform yourself on the following website:https://www.travelspring.de/staedtereise-london/
It helped me a lot to plan the perfect Trip through the city and to see places i never thought about visiting!