Miyajima island also known as Itsukushima Island is the perfect day trip from Hiroshima. The island is one of Japans most famous shines particular its Great Torri which appears to load floating as it sits in the water.
However, there is so much more to this island than just the Torri. You may find you need to stay overnight to explore the island fully. Personal favourite things to do were visiting the Omotesando Shopping street, taking a walking trail and seeing wild deer, and visiting the Daisho-in Temple.
Take a look at Japanguide.com’s cinematic tourist video of Miyajima island for a glimpse into what you can experience.