Wikipedia: http://en.wikipedia.org/wiki/Hiroshima
The Past and the Present
You'd never guess what had happened to Hiroshima in the past, because it's been completely built up again until you look out the trolley window as it passes the Peace Park where you can see the Dome, which is a building that was located directly underneath the bomb when it fell and has been preserved in the same state as immediately after the bombing.
Otherwise, the city looks like any other city. We went on a rainy day because it has a great covered shopping district (Hondori Street). Keighley found Hot Topic on steroids at a place called Maruzen Fashionstores (all one word on the shopping bag), and there was a huge Andersen's Bakery (a Danish chain, but amazing anywhere) with fabulous baked goods and sakura wine, which when opened later had a cloying fruity/flowery scent, like nail polish remover, but which tasted fabulous, like drinking flowers.