[vgeek]

You can visit a gaseous diffusion site outside of Oak Ridge, TN at a new, albeit small, museum: https://amse.org/k-25-history-center/ Much of the infrastructure has been leveled, but there are a few remnants. Site selection factors included obscurity, lots of water from nearby rivers and electricity availability-- they needed MW in a time where KW was a lot of power. There is also the AMSE itself and tours of supercomputers at ORNL.

Due to the availability of hydro generation in the early 20th century, Alcoa, TN (Aluminum Company of America) also established operations in the same area due to the energy required for smelting. Their other large operation hub? Niagara Falls.