This page of our guide to Psychonauts 2 lists the Memory Vaults available in the PSI King's Sensorium.
Two Memory Vaults can be found in this level.
Location The Eye Shrine.
This secret can be found only when revisiting the stage. You must first acquire the Mental Projection skill.
This secret is in a locked cage, which can be opened by using the special skill.
Helmut's Hail Mary
This secret is also found in a locked cage, which can be opened by using the special skill.