Views of the 12th-century sandstone walls and palaces of Jaisalmer Fort in Rajasthan, India. Known as the Golden City, this medieval fort complex is collapsing—the result of recent efforts to bring water into the city without adequate drainage. Today, an international cooperative effort, which includes the British nonprofit Jaisalmer in Jeopardy, the World Monuments Fund, and state and national agencies in India, is working to protect Jaisalmer from future erosion. Photos: © World Monuments Fund.