Odeillo Solar Furnace (world's largest solar furnace, constructed in 1968 in southern France)
https://en.wikipedia.org/wiki/Odeillo_solar_furnaceOpen linkView original on sh.itjust.workshttps://en.wikipedia.org/wiki/Odeillo_solar_furnaceOpen linkView original on sh.itjust.works
That would be so fun to visit
Just gotta be careful about where you're standing 😅