Lantosque is the name of a very beautiful town located high in the Vésubie Valley 20 km north of Nice, adjacent to a national park (Parc national du Mercantour). The town has 1,260 residents, and it famous for a chestnut festival in the mountain foothills each autumn.
Your cemetery is located in this town.
Here is an article about Lantosque at Wikipédia (français) :http://fr.wikipedia.org/wiki/Lantosque
(There is also an article at English Wikipedia, but it does not have any information.)
Please search for Lantosque at Google Images to see photos of this really lovely place.
I hope you can visit some day !