If you have the HD DVD or Blu-ray, the "pieces" of extra content included are:
In a broader sense, a "piece" of this movie often refers to its most famous scene or quote: Field of DreamsHD
A more recent 2019 release that features a high-definition transfer in 4K resolution with Dolby Atmos audio . If you have the HD DVD or Blu-ray,
The film has several high-definition versions that are often sold or discussed under this name: Field of DreamsHD
A 13-minute featurette about the actual baseball field location in Iowa.