I know the feeling, so I say to you: Go to Lisbon, you will love it.
The Morvan is in the east of France, so not on your way, but maybe we will see each other next year at Steemfest.
I know Brussels, we live in Rotterdam half the year and Brussel is not so far away. It's a beautiful city, with lots of interesting musea.
Have a great time in Lisbon!