Premise: The caverns of the Grotte du Grand Roc, to the northwest of Les Eyzies, are a natural rather than a historical phenomenon, but well worth a visit for the weirdly shaped stalagmites and stalactites and the panorama of the V??zyre Valley.

Hypothesis: The caverns of the Grotte du Grand Roc are located to the southeast of Les Eyzies.
Relation: contradiction