My accuracy is pathalogical, Nicole. It's so bad.
If my characters walk through a village, I find pictures of the countryside, maps from the time period, local weather data, the current lunar phase, the history from antiquity up to the current day of the story, or sometimes even back to pre-history, cultural information like ethnic breakdown, enemies and allies, trade statistics, who are the current members of ruling nobility, what is their political situation, what are their ages, who are their relatives and what is their age and political situation, were there any local celebrities in the current era, what is the food and language of the region, what was the local stage of technological development, were there any new advances recently... it just goes on from there.
And I do that for every village the characters visit, whether they stay for five minutes or five days. I'm even starting to have native speakers check over my foreign languages for accuracy, just to get their impressions of my portrayal.