I had an opportunity in 2019 to get lost in the Franklin Institute after hours with a couple of friends. Most of the lights were off, not a soul to be found, an

I had an opportunity in 2019 to get lost in the Franklin Institute after hours with a couple of friends. Most of the lights were off, not a soul to be found, and some of the normal passageways were locked. The only signs of life was near the event nestled in a small corner at the back of the building, which we had arrived late to and decided not to disturb, choosing to explore instead. Cool experience. Another take on this idea can be found in the extremely good anime "The Tatami Galaxy".