Olive oil of the grossal variety Food and drink · Vallada, La Costera, Valencia Image of Vallada, not of the place itself. The grossal is the native olive of La Costera, cultivated above 350 metres of altitude in Vallada and Moixent. It yields extra virgin olive oils with notes of mountain herbs, milled in oil mills that remain active in the comarca. Photo: Enrique Íñiguez Rodríguez (Qoan) (CC BY-SA 3.0) What to see and do in Vallada