Casa do Penedo (Portuguese for Stone House or House of the Rock) is an architectural monument located between Celorico de Basto and Fafe, in northern Portugal.It received its name because it was built from four large boulders that serve as the foundation, walls and ceiling of the house.The two storey house is small in size but it is quite cozy. The ground floor has a kitchen and small living room, all furnished in a rustic style with a eucalyptus-wood and concrete made sofa which weighs almost 800 pounds. The top floor is accessible via a wooden staircase and is the sleeping area. Each room in the house has a different shape to it which is adapted to a particular geometric feature of the rock. There is also a swimming pool outside and an open-air tank which also houses a natural shape of a large stone boulder.The house has suffered substantial vandalism over the years, mainly due to its isolated position. The current owners have reinforced the doors and replaced the original window fixtures, added railings and even bulletproof glass so it is now quite secure.