My wife and I are flying out of BWI on October 15 and returning on the 25th. We will be arriving in Brussels around noon on the 16th, and leaving Brussels around the same time on the 25th. Okay, so our one constraint is wanting to attend a church service near London (Crawley) on Sunday, October 22, and obviously spend our anniversary (10/20) in a way that's memorable. We've both been to Europe before, but not for quite some time, and not together.
So, one thought was to spend 10/16 through maybe 10/19 in Belgium (earting good food, visiting pubs/breweries etc.; and probably staying in Brugges), head to Paris the night of 10/19, and spend our anniversary (10/20) there, and then leave for London/Crawley the morning of 10/21; staying there for the rest of our trip, before training it back to Brussels to fly out on 10/25.
Now, this seems a bit busy, and so another thought was to spend 10/16 through 10/19 in Belgium, head to London the night of 10/19, which would put us in London for our actual anniversary. We would then either close out our trip in London, or head back to Belgium earlier to enjoy a couple more days there.
We are very open to other suggestions, though, and have even considered Amsterdam instead of Paris and/or London, but as I said we would very much like to make the Sunday in Crawley work. Thank you very much for thinking through this with us, and for your time and experience; blessings! :-)