Les Causses de Quercy

Aveyron Gorge

'Causse' is not a word that will often be encountered in UK GCSE French, or indeed 'A' Level French, but any traveller with any lateral view in the departements of Lot, Lot-et-Garonne and Tarn-et-Garonne will undoubtedly notice it on maps.  So rare is it that it is not even included in the online version of Collins English/French dictionary. 

Wikipedia however comes to the rescue - The word came into modern French from the Occitan language, (an ancient language of eastern France, northern Italy and parts of Switzerland). Causse defines an area of level limestone landscape, so a Causse will sit comfortably with the Karst landscapes of the Balkan countries, the Burren in Co Claire, Ireland and parts of the UK such as the Mendip Hills of north Somerset.