When it comes to modern homes, most architects focus on creating a soothing harmony between the indoors and outdoors, meaning lots of natural light, floor-to-ceiling windows, natural vegetation and so on. But Brazilian firm Reinach Mendonça Arquitetos Associados has gone one step further by completely eliminating exterior walls. Located São Paulo, the solar-powered RFC Residence features an open-air ground floor that leads out to a connecting courtyard, blurring the lines between nature and the man-made. Spanning more than 6,500 square feet, the RFC Residence was built for a family of four with a strong passion for cooking.