The Serrano Penthouse in Madrid, Spain, originally had a common problem — flat and orthogonal walls along with the usual (dull) separations of spaces. But Spanish architect Hector Ruiz Velázquez creatively changed this by interposing volume through the addition of truncated cone-shaped pieces. This created a sense of continuity throughout the house and gives the sensation that the house is much bigger than it really is. These curved volumes also had the surprising benefit of helping to flood every inch of the house with light. The unusual surfaces ultimately offer inhabitants walking through the space a continual change in form and light.