The current Penn Station is not visible from above ground because it is located under the Penn Plaza complex on 34th Street between Seventh and Eighth Avenue. The original Penn Station, completed in 1910, was an above ground Beaux Arts structure. It was demolished in 1964 to make room a multipurpose urban complex. As a result, Penn Station was relegated to the space below it and to this day, there is no identifiable stucture to represent it.
This photo was taken during rush hour traffic at Penn Station. Notice the interesting tunnel structure overhead. On the left are a series of ticketing booths and terminals leading to the trains. And on the right are retail and dining facilities for the commuters.