In an effort to maintain a high level of service and frequent departures as we recover from the COVID-19 Pandemic, Big Bus Tours and CitySightseeing Philadelphia have temporarily arranged to operate Hop-on Hop-off tours in conjunction. Any Big Bus/Philadelphia Trolley Works Hop-on Hop-off customers will be permitted to board CitySightseeing tour buses at any stop. Likewise, CitySightseeing customers will be permitted to board Big Buses until further notice.