If you take the time to visit the city of Hiroshima, Japan, we highly recommend that you take the time to pay a visit to the Hiroshima Peace Museum and Memorials in Hiroshima Peace Park. The entire area is dedicated to the destruction of the atomic bomb that caused incomprehensible destruction during World War II.
The Hiroshima Peace Museum Website: http://hpmmuseum.jp/?lang=eng
Japan Guide's web page regarding the Peace Museum: https://www.japan-guide.com/e/e3400.html
The Japanese National Tourism Guide to the museum:
The World Heritage Page dedicated to the A-Bomb Dome:
Hisgo.com's web page dedicated to the A-Bomb Dome: