At the turn of the twentieth century, the Pennsylvania Railroad (PRR) was the largest corporation in the world, and president Alexander Cassatt (brother of artist Mary), was determined to build a tunnel through the Hudson River to connect Philadelphia and Manhattan. In this episode of PBS's American Experience, viewers can learn more about PRR, Cassatt, and the design and construction of both the Hudson River tunnels and the magnificent Pennsylvania Station. As this documentary points out, Penn Station was constructed at the same time as other pioneering construction projects, including the Brooklyn Bridge and the Panama Canal. However, the $59 million project was unique in that it was entirely the initiative of PRR, with no government funding. This documentary explores the project from a variety of perspectives, including workers (over a dozen lost their lives constructing the tunnel) and PRR's decision to demolish the Penn Station building in 1963, which sparked movements to preserve historic buildings. On this website, visitors can watch this documentary in full and check out a number of accompanying resources, including bonus videos, articles, and a timeline.