At first glance this white man-made box seems completely at odds with its context, but deeper scrutiny reveals the fissures and caverns that sculpt this structure. The play of overhangs and diagonals make it a simplified gleaming copy of the mountainside on which it sits. The simple outlines of the exterior give no hint of the carved rooms within its core. This house on the castle mountainside in Spain was designed by Fran Silvestre Arquitectos. Photos by Fernando Alda.