London Vol 1- Westminster Abbey
Westminster Abbey, is as stunning as you would expect. It was founded in 906, and is the location of all the royal weddings. Hello Meghan and Harry! A couple of TIPS, first of all, buy tickets ahead of time to avoid lines. It saved us sooo much time! (for all tourist destinations, in London, and elsewhere) Secondly, this is more of an observation, you cannot take photos inside the Abbey itself. So be prepared to take it all in without a camera, outside you can take as many photos as you like though.
I personally, got Harry Potter vibes from the architechture. It is stunning. I was also in awe of myself, because of how many literary celebrities I knew that were buried in the abbey, from Shelley and Chaucer to the famous Shakespeare and Dickens (3 years of English lit came in handy). Overall, I would recommend visiting this historical landmark, but expect to be surrounded by some tourists.