SPG Architects transformed an abandoned steel frame and concrete slab structure into a five-level, 18000 SF, indoor-outdoor residence on a rain-forested mountainside overlooking the Golfo Dulce. The primary criteria for this project were to be environmentally sensitive, technologically advanced, and modernist by design. A spectacular view out to the bay merges with the infinity pool. A flexible building perimeter provides a seamless flow from inside to out that completely blends the built environment with the natural setting. The house is entirely self-sufficient. Energy is provided by photovoltaic cells on the roof and a hydro-electric plant on site. Appliances and lighting were chosen for low power consumption. Solar hot water panels provide domestic hot water. Maximizing cross ventilation and ample overhangs has eliminated the need for air conditioning in this year-round tropical climate. These technological features, architectural planning and sensitive detailing create an indigenous yet distinctly modern piece of architecture.