Scattered across the surface of Belsavis are ancient structures built from an unknown material, practically impervious to weapons and scanners. Engraved on the walls and doors of these structures are strange warnings in ancient languages, imploring anyone who finds the structures to stay away and not unseal their contents.
Republic science teams have opened a handful of these alien vaults, finding others broken open before their arrival. The vaults' contents are classified even to most prison personnel, but rumors suggest that they contain ancient weapons, machines and even living creatures--some perfectly preserved, others ruined. After several science teams were lost, further exploration was halted. Protection of the sealed vaults is one of the administration's top priorities.
A few vaults--seemingly empty and opened long ago--have been converted for use by the Republic as additional holding facilities or secure storage. In addition, stories persist among both the inmates and the low-level prison staff of much larger vaults of similar design in the prison's Maximum Security Section.