Where was (500) Days of Summer filmed?

Landmarks & buildings Bradbury Building United States Building

“Christopher Hawthorne of the Los Angeles Times describes the film as having "finely honed sense of taste" to include the Bradbury Building where Tom goes for his job interview.” Wikipedia

Landmarks & buildings Dorothy Chandler Pavilion United States Opera house in Los Angeles, California, part of the Los Angeles Music Center, used by LA Opera

“Buildings used include the Los Angeles Music Center (which includes the Dorothy Chandler Pavilion) and the towers of California Plaza.” Wikipedia

Landmarks & buildings Fine Arts Building United States Historic office building in Los Angeles, California

“The older Fine Arts Building is featured in the film, in a scene where Tom shows it to Summer and mentions its designers, Walker and Eisen, two of his favorite architects.” Wikipedia