Search Engine: Google Images.
Result: Really only two good images. One from the cover of the book---
"Wow!" I think to myself, "cool interpretation of St. Teresa of Avila's Interior Castle! I like how the glory of God is radiating out from the center castle to the other six, sort of drawing the seeker in, and... oh wait, it says Interior castle at Excalibur, Las Vegas."
My take-away from this embarrassing experience is that we need better imagery of St. Teresa of Avila's Interior Castle if these are the only two I could find.