Whoa! I DID NOT know this.
Back in the day, NASA operated a number of Apollo Program related simulators at Langley. One of them was this bad boy, the “Lunar Excursion Module Simulator (LEMS).” LEMS was rigged up to bear 4/5ths of the weight of a test Lunar Lander to support lunar landing simulation. They even ran sims at night to help simulate lunar lighting. I knew this. In fact, I just sold a story that mentions this facility.
What I did not know…what I would not have suspected…is that this thing, which the Langley folks call “The NASA Gantry” it still in operation.