Two hit men burst into the Daniels Hotel and gun down Bullitt's partner and the mob witness. They are taken to San Francisco General Hospital, located at 1001 Potrero Avenue since 1872.
Then ... The ambulance pulls up in front of the emergency room on 22nd Street.
...and Now, it hasn't changed at all - the view looks west down 22nd to Potrero Ave.
Then ... Later, Bullitt is seen heading east down 22nd Street looking in vain for one of the hitmen after a nerve-jangling chase through the hospital.
... and Now
Then ... Below, the main hospital entrance is seen in an outtake from the movie.
... and Now, the entrance is the same but the brick building was replaced in 1973 for improved earthquake safety by a newer, blander structure.
... on location ... here's the crew filming one of the scenes in the hospital. Real doctors and nurses were used for added realism.