The Lord of the Rings Online Point of Interest

Turbine's official The Lord of the Rings Online website has been updated with a new "Point of Interest" feature, this time exploring the Silver Deep.
In the days after Thráin II left his home in the Blue Mountains for the Wilderlands, his son, the great Thorin Oakenshield, began to improve upon the halls he had built. As Thorin continued to expand his halls, perhaps in an effort to recreate one of the great dwarf-kingdoms once found beneath Ered Luin, he ordered a new hall to be delved beneath the place where the Elf-refuge of Edhelion had once stood.

The Silver Deep was never completed, however, for the dangers of the ancient relics of Edhelion were brought to Thorin's attention by Gandalf the Grey as they prepared to begin their journey to the Shire, and thence to the Lonely Mountain. Thorin ordered the Silver Deep closed and sealed forever. A guard was set upon the mine, and they remained shut even after Thorin was slain in the Battle of Five Armies, and Durin's Folk returned to their home in the Lonely Mountain far to the east.