Miyajima is considered to be one of the 3 most scenic places in Japan, and in my opinion, of the famous 3, Miyajima is the best place for a photographer. To be fair it is also the most diverse having everything from Itsukushima Shrine (the tori gate that is floating in the ocean) to it’s own mountain… with monkeys that live on the top. Who doesn’t like monkeys? I mean really?
Also it should be noted that deer walk around the island like they own the place. I went during cherry blossom season and it was really beautiful, but Miyajima is worth going to at anytime of the year. Also I was surprised that sometimes the floating tori gate, isn’t floating. All the famous photos you see of it are when the tide is in, but when the tide goes out you can walk up right next to (or search for clams like some people do).
Miyajima is about 20 minutes to one hour away from Hiroshima by boat–depending on which boat and from where you leave. Be sure to check ferry schedules going both ways before you go, if you miss the last ferry there are not too many places to stay (they can also be a little expensive) and during peak travel season you may end up without a place to stay!For more access information see the Japan-guide.com.
Also here is the official site of Miyajima.