Great that you made it there! I seem to remember thinking that Ariane 1 was big, so I imagine that an Ariane 5 will have been quite something. Of course, you will have to travel a bit further to see one being launched…

Although the UK is not exactly part of any European tour these days, the museum at Duxford Aerodrome (https://en.wikipedia.org/wiki/Imperial_War_Museum_Duxford) has Concorde and lots of other interesting aircraft, including some iconic and rare ones. You could walk through the Concorde and some other airliners many years ago, maybe still can. Sadly, I don’t think they have much, if any, space hardware: the UK stopped making big rockets in the early 1970s, but there is an unused Black Arrow at the Science Museum in London, apparently.