Iron Curtain: Contemporary design pays a surprise visit to Joplin, Missouri, in a unique collaboration of architect and owner. In a leafy, upscale neighborhood of Northridge Estates in Joplin, Missouri—which was spared the destructive wrath of the tornado that tore through much of the town last year—most of the houses are faux-Georgian McMansions. But one stands out. People driving by Bill Perry's aptly named Heavy Metal House frequently stop to admire the 5,000-square-foot, one-story structure that sprawls across its 8-acre wooded site. From the road, observers can readily see the exterior of large glazed openings and perforated rusting steel panels.