Châteaufort is a commune in the Yvelines department in Île-de-France in north-central France. It is located 9 km south of Versailles, and 27 km southwest of Paris.

Guyancourt is a commune in the Yvelines department in the Île-de-France region in north-central France. It is located in the south-western suburbs of Paris, 21.2 km from the center of Paris, in the "n