Ancient building, that looks a bit like a temple made out of jade from the outside. Once, it was used to melt the hardest metals, stolen form another realm. Therefore you needed extreme heat, which only ceramic golems could withstand. Sadly the energy system was destroyed as something overheated the giant forge on the lowest floor, incinerating the workers. It can be repaired, but would awaken the golems, which are set to emergency mode ... and maybe whatever destroyed the facility is still here.