San Marino
The final country in Europe.
A tiny country landlocked inside of Italy was the final country that I needed to visit in Europe to say that I've visited all of the countries in Europe.
I don't count Russia and Belarus as countries. They're terrorist states. Just like you reading this probably don't count either Palestine or Israel as a country, or both maybe.
San Marino was a cool place. Great views. Good food. Friendly people. Definitely somewhere to visit.
I probably won't go back as it's tiny and I've seen pretty much the whole country now.