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Just realised I missed off Philippines so i'm back to 26.

We actually forgot three for Sam and one more for Becca. We saw someone's list above - we have both been to the Vatican and Sam has been to San Marino and Monaco.
10 new countries by the end of 2019 is feasible. Though, you will have a lot of traveling in 2019 if you are doing only three this year.
Cool, a potential meet-up, but otherwise recommendations are great! 😊

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Oh gosh I am forgetting places now too! Hahah. Yeah my problem is I travel 2-3 times per month, but usually countries I have already been to for work.