Irene, Gauteng Province, South Africa | Built in 2005 | 7 bedrooms, 6 baths | 6,400-square-foot floor plan, .5 acre | Architect: Charl Groenewald The indigenous grassy fields of South Africa’s Highveld Plateau surround a neo-Brutalist home designed by esteemed South African architect Charl Groenewald. Grid-like in its simplicity, the design presents dazzling window walls,…