It's always worth checking things, especially if they impinge on the story; for example, if the time needed to get from point A to point B is relevant, it's easy enough to find sites that'll calculate routes, tell you train or ferry times, etc.
But don't include exhaustive amounts of information if it isn't needed; too much detail can be boring, and a little vagueness often covers a multitude of sins!
For example, one novel I read had a character travel by road from a central London location to London Airport in about twenty words; it was factually accurate but made it sound like a five minute drive, rather than about an hour through bad traffic. I suspect that the author had no idea how long it would really take, so he left it very vague and it just about worked, whereas if he'd actually said "ten minutes later he pulled up at London Airport" most British readers would have known it was wrong.
