Below the plaza was an underground shopping mall called the Concourse that connected the buildings in the complex. Deeper still were parking levels and a train station that served New Jersey commuters and provided connections to New York City subway lines. Surrounding the six underground stories were walls of concrete three feet thick and eighty feet deep, affectionately called “the bathtub.” The nickname was a misnomer: the walls didn’t contain water, they held back the Hudson River.
