Resort Size: Covering  almost 40 square miles, it is the size of San Francisco or 2 Manhattan islands. A third of its  25,000 acres, is designated as conservation land. Employees: With more than 70,000 cast members, Walt Disney World Resort is the largest single-site employer in the United States. Celebrating Christmas: Disney World contains 1,500 Christmas trees  and resort hotels  glow with more than...