Fifth Avenue, Manhattan

You may be looking for 5th Avenue in Brooklyn.

Fifth Avenue was a Manhattan street forming the eastern boundary of Central Park. Thus, its portion was called Central Park East.

Map of a portion of Central Park (COMIC: Spiral Staircase)

It stretched at least from East 60th to East 79th Streets.

Metro Museum of Art and Frick Collection were situated on the Fifth Avenue. (COMIC: Spiral Staircase)