Wait for the lift to rise and then climb to the treasure chest at the top. Burn the bodies on the mesh platform and push of the extra weight. Light the torch when you enter the tomb with either the pot or some flint. Once you have the Climbing Axe, travel to the Mountain Village and return to the Tomb of the Unworthy at the base of the waterfall.
If you complete all of them you get the 'Intellectually Superior' achievement. By solving the puzzle at each tomb you will get a treasure map.
