Definitely, Maybe was filmed in New York in the United States of America.
The Mall (Central Park)
In movie
Real
Scene was shot The Mall, running from the flower bed on Center Drive in the south to Bethesda Terrace in the north, is the only straight path in the entire park. The path runs through a series of statues of famous writers known as the Literary Walk and past the Naumburg Bandshell. The walkway and surrounding American elms were built in 1857 and designed as part of the large park by landscape architects Frederick Law Olmsted and Calvert Vaux.
New York
Will Hayes´Apartment Building
In movie
Scene where Will is walking home to his apartment with his daughter Maya. They have a conversation about sex.
Timing: 00:04:59
Real
Scene was shot at the 88th Street apartment building off Broadway.
New York