The 2010 quake kicked off a terrible cholera outbreak in the island nation. While it’s mostly under control, poor sanitation means the epidemic could return. A new health center may offer a different way to address the problem, with creative architecture. Perforated walls keep air flowing, and hidden tanks cycle water through extra layers of purification. Even the floors slope just so for easy spray-downs. The building stands as a living experiment. If it works, it could be a model for clinics throughout the third world.