High atop a 230-foot seaside cliff outside Sydney, Australia, the 3,498-square foot Holman House is a palace fit for a rock star. The plan is open, maximizing the benefits of sunlight and sea breezes. The concrete core acts as a thermally insulated box, reducing need for heating, even in the mild climate. The lower areas are of rough stone, blending into the local rock. The interior furnishings are natural materials.