Just finished reclaiming my Belgian citizenship and i’m about to receive my passport! What is something I can do in Europe that only European citizens can do and other people don’t know about?

So I was thinking about my future and moving back to Europe to live with my family.

I'm 38 years old, but the first thing that hit me when they accepted my paper work was "omg I can go back to school if I want to!" In the US that simply wasn't on the table because it would cost $10,000's/yr.

That kind of blew my mind, because it opens up so many new doors I never even thought about. So I'm wondering what other things that a European citizen has access to that's really cool and unique, that I probably wouldn't know about