What is "illas"

Illas is a municipality in Asturias, Spain, located in the western central part of the province and bordered by the municipalities of Castrillón, Candamo, Llanera, and Corvera de Asturias.

Illas (variant: San Julián) is one of three parishes (administrative divisions) in Illas, a municipality within the province and autonomous community of Asturias, by northern Spain's Picos de Europa mountains.