I spent the Summer of 2008 interning at Idaho National Lab, at the main campus located in Idaho Falls, about 50 miles west of the Wyoming Border. Driving in the other direction, after passing various ominous and well-guarded military and DOE installations out in the desert, you might come across the town of Arco, Idaho. Arco is the home of the Experimental Breeder Reactor (EBR-1), the first reactor in the world used to generate electricity, illuminating 4 200-watt light bulbs in 1951. Established by LBJ as a National Historic Landmark and decommissioned in 1964, EBR-1 remains a tourist destination, and it was one of my favorite fields trips of the summer.
The following video rather stylistically summarizes the history of the reactor, from a 1950s perspective and aesthetic.
Of note, in the parking lot of the EBR-1 are two massive nuclear powered jet engines, relics from the Nuclear Energy for the Propulsion of Aircraft project in the 40s.
The project was abandoned in 1961 due to radiation shielding issues.