How about traveling to France, the Netherlands, and Belgium?

It’s very good. The Netherlands recommends going to Amsterdam, The Hague and Giethoorn; Belgium recommends going to Brussels. If you have time, you can also go to Leuven, Ghent, Antwerp and other cities; France recommends going to Paris, Nice, Marseille If you like red wine, you must go to Bordeaux. If you travel in August, you can also go to Provence to see lavender.

I suggest you also consider Luxembourg. Although there are no special attractions, you are already there. It would be a pity not to go there. The time limit is only one day at most.