"Believing the old adage that folding a thousand paper cranes would make a wish come true, Sadako tried steadfastly to recover from her illness by folding paper cranes. Her wish was in vain. After her death, a monument was built for peace and to console the souls of Sadako and all the other children perished due to the A-bomb. Today, the paper crane as a symbol of peace has spread around the world with the story of Sadako."

The atomic bomb dome at the Peace Park in Hiroshima. Quote from a Wikipedia article: "After the nuclear attack, Hiroshima was rebuilt as a 'peace memorial city', and the closest surviving building to the location of the bomb's detonation was designated the 'Atomic Bomb Dome,' a part of the Hiroshima Peace Memorial Park."

Hiroshima - The 6 August 1945 nuclear explosion was almost directly above this building and was the closest structure to withstand the explosion. The building has been preserved in the same state as immediately after the bombing, and now serves as the reminder of nuclear devastation and as a symbol of hope for world peace and elimination of all nuclear weapons.wikipedia