The castle is located in Vilasobroso, a village in the municipality of Mondariz, belonging to the comarca of O Condado.

It sits on Landín Hill, overlooking the Condado valley, right up to the Portuguese border.

Due to its strategic position, the castle was known as "the key of the Kingdom of Galicia".

The name of the Castle, and the village itself, comes from the Latin SUBEROSUM, in reference to the 'sobreiras', Quercus suber or cork trees that once surrounded it.

The castle was restored from its ruinous state thanks to the efforts of local journalist Alejo Carrera Muñoz, who in 1923 bought the ruins of the castle from the Count of Torre Cedeira for the sum of 5,000 pesetas.