Played for a couple of hours, got to the point where we had to do the puzzle in the vault (by spinning the symbols to match the page in the journal). Successfully completed all three rows, the water drained and the door opened. Apparently a map should have appeared on the altar, but there was no map. We tried searching the locations where apparently some medallions appear, but no dice.
Is this a game-breaking bug on the first tall tale of a 2 year old game? My friends that I encouraged to play now want to uninstall :(