In the closing minutes we see Ann boarding a helicopter atop the Pan Am building--this helicopter shuttle service from midtown Manhattan to JFK airport was in operation from 1965 to 1968, and again briefly in 1977; the Pan Am building was completed in 1963 and was rebranded as the MetLife building in 1993.
This was the first appearance of the character Noel Prince, the British photographer. He appeared in the second part of this episode, and then he reappeared later in the season in episode 22 "He and She and He."