Then explore the old houses, wells, and courtyards in the town's narrow lanes leading back down to the Place du Champ-de-Foire.
There are no courtyards anywhere in the town. 
mnli hypothesis: There are no courtyards anywhere in the town.  premise: Then explore the old houses, wells, and courtyards in the town's narrow lanes leading back down to the Place du Champ-de-Foire.