Elsa sends word to O'Hara to meet in the aquarium. This would be the Steinhart Aquarium in the California Academy of Sciences in Golden Gate Park, also filmed 11 years later in the 1958 movie The Lineup.
... in 1968 ... the Academy, the aquarium is marked by the arrow, is in this 1968 aerial photo, across the concourse from the old DeYoung Museum before both buildings were rebuilt (map).
... in 1948 ... this is the entrance to Steinhart Aquarium a year after the movie was released, snapped in the central courtyard of the Academy.
... and Now, the Academy was razed in 2003, completely rebuilt and reopened in 2008 to great acclaim. The recent photo below of the new $500 million complex was taken from the tower of the DeYoung Museum opposite.
They meet inside the aquarium - Elsa tells him she is now ready to go away with him. " I don't care where it is Michael. Just take me there ... take me quick ... take me!" (the lady from Shanghai doesn't mince her words).
Then, for the first time, they kiss. Pardon the pun, but if he wasn't hooked before, he most certainly is now.
... Then ... A shoolboy spots the intimate moment and beckons his classmates over.
... in 2003 ... Here's the same corner taken shortly before the Academy was razed.
... and Now, the new aquarium in the rebuilt Academy incorporates the latest tank construction techniques for the ultimate 'you are there' experience.