Before the Shattering, High Keep, located in Highpass in the tall Antonican mountain range known as the Serpent's Spine, was also sometimes called Highkeep Castle, Highpass Hold, or Highhold. High Keep was established by Sean McCabe and became well known as a gambling resort and spa, equipped with natural bathhouses and mud pits.
Carson McCabe, Sean's son, eventually came to dominate trade on most of Norrath. High Keep was the seat of a former empire that spread its power over central Antonica. The inhabitants of High Keep used their wits and resources to form a thriving center of trade, both legal and illegal, passing through the center of the continent.
During the rule of Carson McCabe, while adding additional floors under the keep, construction crews tunneled into the Pickclaw goblins, who remain a problem there to the present day.
The post-Shattering fate of High Keep and its major passage in Antonica, Highpass Hold, was previously unconfirmed; however, some rumors indicate that it was (or is) the secret headquarters of the powerful Far Seas Trading Company (FSTC).