Fresh Kills--a monumental 2,200-acre site on Staten Island--was once the world's largest landfill. From 1948 to 2001, it was the main receptacle for New York City's refuse. After the 9/11 attacks, it reopened briefly to receive human remains and rubble from the destroyed Twin Towers, turning a notorious disposal site into a cemetery. Today, a mammoth reclamation project is transforming the landfill site, constructing an expansive park three times...