You can, I believe. If the photo is taken on a cell phone with location enabled, it will embed the coordinates into the EXIF data, however it is encrypted. There are programs you can download that will decrypt that data. Sites like imgur and Facebook strip out all EXIF data, but personal blogs where the user hasn't taken the time to include that feature will retain the image's information. That being said, looking at the properties of the photo will reveal only the date the image was taken (if available) and the other generic information: upload date, image format, size, etc.