Zoo Tower, An American Icon

Zoo interlocking is a classic Pennsylvania Railroad structure and an iconic symbol of that great railroad since 1935. Named for the Philadelphia Zoological Gardens, whose trees are seen at the right in this view, Zoo is the junction for two four-tracked routes. The Amtrak train curving to the right is on its way to New York via North Philadelphia, Trenton and Newark. The line my train is on heads West to Harrisburg as Amtrak, and from there on the Norfolk Southern to Chicago.

I apologize for the quality of my photograph shot through the window of an Amtrak Keystone Service coach. You may see much better photography and Zoo Tower information on a British railfan's web page at this link.