Couldn't see that anyone had posted this so.....
(btw my computer is still dead, I restarted the entire game on my laptop
)
Once you've found all the treasure maps and go into the treasure cave there's a tombstone just above the treasure room. If you walk up you kind of go through the wall and if you read the tombstone it's a tribute to.........well, wont spoil it for you but I thought it was a nice touch.