La Vall d'Uixó (la ˈvaʎ dujˈʃo, also known as Vall-llarga, Vall del Duc or simply as La Vall; Vall de Uxó) is a town situated in eastern Spain, in the Valencian province of Castelló. La Vall is located 25 km to the south of the province's capital Castelló, 45 km to the north of the community's capital Valencia and 8 km to the Mediterranean Sea, so it is at 118 m above sea level.
The current territory of La Vall d'Uixó has been occupied since prehistoric times by different human groups. La cova de Sant Josep and other caves in the surrounding area represent the most ancient vestiges in La Vall, from the chronological point of view. The archaeological works in these caves have revealed that they were occupied by hunters of the Upper Paleolithic period, according to a chronology of the C-14, approximately 16,000 years BC. There, two rocky panels were found with representations of cave paintings, giving an idea of the importance of place.