This enormous vertical shaft, much like the Giant Palace below, is entirely forged from refined steel, adorned with colossal, thick, and coarse devices, especially the steel pipelines large enough for an adult to walk inside, exuding a dense Dwarven forging style, strikingly similar to the smelting forge below.
Even after thousands of years, not only has this place shown no sign of rust, but it also glistens as if freshly maintained.
Just like all Dwarves, the Supreme Shatana, when performing the Vein Sealing Technique, left a means for his descendants to rekindle Dwarven glory here.
During the sealing, time within the vein remains constant.
Knowing this Dwarven quirk, all sage races flock to the ruins of Dwarf Cities, because if one is fortunate enough to unlock treasures left by a Dwarf Kingdom for their descendants, it's more than mere fortune; establishing territories and founding cities and kingdoms are typical occurrences.