La Granja Viader
Built by M. Raspall, 1925 for Marc Viader, a businessman from the village. It was a dairy farm until fairly recently, and the Viader family were the inventors of Cacaolat, a bottled chocolate milkshake. The Granja Viader in Barcelona still exists and is worth a visit. You can have a look here

(There is also a photo of the farm as it was then!)