With a city full of love, it's easy to see why so many have left their hearts in San Francisco! Happy Valentine's day to all the lovers who passed through our city and left their hearts with us; we will keep them safe! #LoveinSF 📸: 415urbanadventurer leahisms marvins_view sanfranheart hawke_photos oneill.mclean @pier39 fishermanswharf @umbrellaalleysf