Why is One Liberty Observation Deck no longer in the Philadelphia CityPASS attraction line-up? September 21, 2020 20:53 Updated Effective Tuesday, September 15, One Liberty Observation Deck suspended operations indefinitely and is currently not available as a Philadelphia CityPASS attraction. Related articles How do I upgrade my Empire State Building ticket with New York CityPASS tickets or C3 tickets? Philadelphia CityPASS Attraction Schedule Updates When do my CityPASS tickets expire? What is the difference between a CityPASS booklet and mobile ticket?