Gandûm-Thûr is a vast mine in and around Undercity. The mine was started in the First Epoch by a mining company out of Tharuzbaluk. They worked the mines for its silver. When they were driven from the area by Paradomea, the new owners worked the mines for its silver and a rare crystal. This crystal became a currency in Paradomea called the crystal piece.
The mines can be a hazardous area. This is due to its many deposits of deep rocks. This radioactive material led to the creation of the Mutants. Another indirect product of the mine is Maniac Conduit. This drug was created to increase the productivity of those toiling away in the pits of Gandûm-Thûr.