Architecture studio Jordi Hidalgo Tané has extended a small stone building in rural Navarra, Spain, with a subterranean concrete annex accessed via a glass corridor.

The original building, called Landaburu Borda, sits close to the town of Bera and overlooks the surrounding landscape of the Navarra mountains.In order to not disrupt this dramatic setting, the extension has been hidden under the adjacent hillside.

It houses a large living, dining and kitchen area and sits across from the original building.To work in this exceptional location is an exercise of respect to the fragile building and especially to the mystical power of the Navarra mountains, rich in history and legends,” said Jordi Hidalgo Tané.