Bow your head, say a prayer and perhaps even light a candle in Memorial Cathedral for World Peace. This splendid place of worship may not always be accessible, so check ahead for times if you'd like to go inside.
To explore this principal church, find your way to Hiroshima City Centre. There are plenty of other worthwhile attractions in this area, including Hiroshima Peace Memorial Park, Hiroshima Castle, and Atomic Bomb Dome.