The Silver Sanctorum

Amid the lush and extremely fertile, wooded lowlands of Harindash, there rises a collection of towers and walls made of what appears to be pure silver, but which is actually a material harder than any steel or stone. None but a select few are ever allowed into the Sanctorum, as it is directly under the rule of The Clockwork City and, more specifically, a certain knightly order of said underground settlement. The fact that it is also behind The West Gate also severely limits the number of people who could even gain access to the fortress.