The Oculus, the gleaming white World Trade Center Transportation Hub that is the centerpiece of the revitalization of Lower Manhattan, is striking for its futuristic design as well the contrast it draws to the structures that surround it. Designed by the Spanish architect, Santiago Calatrava, at a cost of $4 million, the Oculus is approximately 800,000 square feet. From the outside, it resembles a bird with giant, outspread wings, ready to take...