Unlike many cathedrals, the one at Chartres is visible from miles away across the flat landscape. It has the largest collection of medieval stained glass in the world; the 'Chartres blue' in some of the windows is supposed to be particularly rare.
While we were looking around, the organist began practicing. Turn on the recording on this page to get a sense of what we experienced.
You can probably turn the recording off again when you get to the pictures of the market--it doesn't add anything to that experience.