There is a category for Google Plus Pages that is meant for blogs and websites, though it may not be obvious or easy to find for some. Follow these basic steps on how to create a Google Plus Page for your blog or website.
If you get a Google+ account, one added benefit is that you can now upload an unlimited number of higher quality photos (up to 2048 x 2048 pixels) to Google+ and/or Picasa Web Albums, for free. There are some differences in how your photos are handled and stored, depending on if you upload photos in Google+ or in Picasa Web Albums. The details are explained here.