souterrains

In a sentence

• Les passages souterrains permettent de traverser la ville à pied en évitant la circulation.

  Underground passages allow traversing the city on foot while avoiding traffic.

  The term 'souterrains' here refers to subterranean structures or channels used for pedestrian movement under the surface.

• Les souterrains du château sont remplis d'histoire et de mystères.

  The castle's underground tunnels are filled with history and mysteries.

  In this context, 'souterrains' highlights the underground spaces, likely connected to or under a specific structure, like a castle.

• Après la pluie, l'eau disparaît dans les souterrains naturels sous la montagne.

  After the rain, the water disappears into the natural underground areas beneath the mountain.

  Here, 'souterrains' denotes natural subterranean regions where water flows, emphasizing geological formations.