Riverside Park at 72nd Street. The New Deal West Side Improvement Project transformed Riverside Park from a steep slope into two relatively flat areas separated by a retaining wall (seen here at lower left). The train tracks run behind the retaining wall and under the upper level of the park. The lower level, seen here, is on the same level as the river and contains vast amount of parkland and numerous ball fields, athletic fields, game courts, and playgrounds. It is, however, separated from the river by the Henry Hudson Parkway, but access is provided to the river bank by passages under the highway every 10 blocks or so.