Roughly the area of the location (on World Series Way on the Northeastern University campus)of the ball park that was the home of the American League Boston Americans (precursor to the Red Sox) who played here from 1901-1911 (see attached map).
It was also the site of the first World Series in 1903 between the Boston Americans and the Pittsburgh Pirates. Boston won 5 games to 3.
This park also saw the first perfect game in the modern era, thrown by Cy Young on May 5, 1904.
Huntington Avenue Grounds was demolished in 1912 when the team moved to Fenway.