My daughter and I will spend a week in the UK, a day in Paris, then 3 days in Pau where we will meet my other daughter who is studying abroad there. From Pau, we have 10 days to see as much as we can reasonably see before we fly home from Paris (with another day or two there before our flight). One daughter wants to head south for ancient history (Rome and Athens); the other wants to go North for family history (Amsterdam, Switzerland, and Ireland). I'm trying to create a compromise to make the best of my first and last trip abroad (age and health issues). Any suggestions? Would it be doable in an insane global pass frenzy?
Check the Ryanair website (they fly out of Pau) to see which destinations they fly to. Cheap, no thrills, (if you don't take too much luggage). Being an Irish Airline I imagine they will have direct flights to Ireland. Difficult to suggest destinations not knowing your interests, or whether or not you want a better chance of good weather, or what time of year you are visiting.
I'd suggest to first choose one ancient history and 1 family history country. Because of all the unrest (ok, Riots!) going on in Greece now, Id go for Rome. Then I'd go for the nearest country to Italy for the family history... Switzerland. By doing this it makes it possible for you to get a special Eurail Pass.... one that gives a special price if you travel in 3 'bordering' countries. As an example (and assuming your daughters are both under 26), passes for all of you to travel 1st class by rail in France, Italy, and/or Switzerland would cost $979 for all three of you... for unlimited travel on 5 separate days (see Rail Europe's website). You could start using these for travel from Paris to Pau. I think you'll find that the train travel will be much cheaper than flying and much more enjoyable.