On the D36, a stretch carries a sign "military field". This is the former Féniers airfield. The latter, under the jurisdiction of the Courtine camp, was included in the list of airfields as early as 1926 but, surrounded by steep slopes, often snow-covered, it was not adapted to new aircraft models and was closed to public traffic in 1947; it was used for some time to train the troops. As a tribute to this period, a Fouga school plane is on display at the entrance to Féniers.