this is the Mines of Almuria, where red marble and gold were mined until Almurs' Haven was struck by an errant comet. This section of the mine was buried, but still exsists today much as it was before, with a swift running river flowing through it.
Many treasures can be found in the mines of Almuria including sapphires, emeralds, rubies, and topaz; not to mention red marble, gold and silver! coming soon a revision to the mine and lower price! yipee, I'm back!