Japan Travels: An Evening Walk at Peace Memorial Park- HIROSHIMA, JAPAN.

The Hiroshima Peace Memorial (広島平和記念碑, Hiroshima Heiwa Kinenhi), originally the Hiroshima Prefectural Industrial Promotion Hall, and now commonly called the Genbaku Dome, Atomic Bomb Dome or A-Bomb Dome (原爆ドーム, Genbaku Dōmu), is part of the Hiroshima Peace Memorial Park in Hiroshima, Japan and was designated a UNESCO World Heritage Site in 1996.[1] The ruin of the hall serves as a memorial to the over 140,000[2] people who were killed in the atomic bombing of Hiroshima at the end of World War II. It is permanently kept in a state of arrested ruin as a reminder of the destructive effects of nuclear warfare.
(Description taken from Wikipedia, Link below) https://en.wikipedia.org/wiki/Hiroshima_Peace_Memorial#History