LANDES HOLIDAY RENTAL COTTAGES, VILLAS AND HOUSES | Aquitaine, South West France. Landes is a department in the South-West of France in the Aquitaine region. It’s surrounded by the departments of Gironde, Lot-et-Garonne, Gers, and Pyrénées-Atlantiques, as well as the Atlantic Ocean on the west. Landes is, after Gironde, the second largest department of mainland France. Stay in a Landes holiday rental villa or cottage and explore the wide range of outdoor activities on offer. Good use is made of its lakes and water sports are very popular. The area is also perfect for hiking and cycling enthusiasts.