I'm a dual US/French citizen. I've only rarely been to France, but I'm looking to change that next month spending a few weeks traveling around the country and the European continent.
Because of freedom of movement, I know I can arrive anywhere in "Europe" without the need for a visa, but in practice are there any countries that will be more difficult to arrive at? More importantly, given I'll be traveling around the continent anyway, so my location of arrival isn't particularly important, what are the cheapest countries/cities to fly to and from the US, that are connected to the rail system?