The entrance to the tomb is in the building in the back right corner. Go down the stairs.
There is a hidden door here.
Collect the treasures.
Put the keystone in the slot.
Collect the treasure in the bedrooms.
Examine the hole in the wall.
Examine the other hole in the wall.
Explore the dive pool.
Examine the shiny hole. The other holes don't really do much, but a few have treasure in them.
Dive back into the pool.*At this point in the mission you will need to report in. After completing the various missions they give you, you will receive a keystone that goes in this next slot.
Put the keystone in the slot.
Continue through the hall.
To make this room work, move the statues on the right side so they mirror the statues on the left side. To make it a little easier on you, if you just pull the three statues out, moving the third one will activate a hole in the wall to appear. When you examine it the 3 floor switches will appear and you can then move the statues onto them. Anyway, here is what I did to move the statues...
Examine the hole.
The statues on the floor switches will unlock this door...
Examine the hole in the wall.
Down the stairs... Collect the treasure in the chest to activate the floor switches.
Push the statues onto the floor switches.
The statues unlock this door.
This is probably the most tedious set of corridors this game has dealt to me yet. There are no traps or anything, just way too many halls to walk down.
Alright we made it to the door...
Collect the treasures in the chests, and then report in.
