Odds are good you know a bit about the development of the nuclear bomb that ended the Pacific campaign of WWII.
If you haven't gone deep into the history, discussions are often relegated to the Manhattan Project's work in Los Alamos where the bombs were built and tested. But did you know the nuclear materials used in said bombs were not created in Los Alamos but instead were split between two other sites in the USA (for safety and security purposes)?
The plutonium enrichment was actually achieved at a reactor outside of the Tri-Cities in Washington state, and the Hanford B Reactor is now a National Historic Site that is open for tours in partnership with the Department of Energy!
I was fortunate enough to attend a media visit to this one and have to admit, it is a pretty amazing tour all around.