Celebrate #NationalSubmarineDay by visiting a historic submarine in Philadelphia. ⚓️ Did you know Submarine Becuna opened as a museum in 1976 as a part of the U.S.’s bicentennial? Tap the link in our bio to discover more attractions found along Philadelphia’s Delaware River waterfront 🔗 phillyseaport 🚢 🌊 #discoverPHL #SubmarineBecuna #Philadelphia #Philly #DelawareRiver #Waterfront #DelawareRiverWaterfront