The approach from the middle of the 1st fairway at Engineers is deceptively innocuous as the first time visitor has no idea what awaits . . .
This back left pin is the second most difficult location to get close to, only the back right is tougher
The spine visible clearly in this photo is the center piece of this green both literally and figuratively as it’s the spine that accentuates the natural front to back tilt of the green to create distinct playable sections without sharp boundaries:
A very distinct plateau, created by the thumbprint (as Redanman calls them) on the back left edge of the green is seen here from the 18th tee . . . while heading home one need only look to the left to see the green that likely greeted the first time visitor abruptly.
View of thumbprint from behind the green:
From a different angle the back ledge is clear:
Your first trip to the plate at Engineers let's you know that these aren't your ordinary greens.