There are two secret rooms under the pool in the location Viracocha's Vault where Diggy must light up the crystals which connect Mama Quilla's and Inti's power to the door mechanism.

But water needs to be drained first.

Once the water is drained Diggy needs to fix the gate mechanism. All those underwater lights have turned off suddenly.
In order to activate the sunlight in the Inti's secret room, please place the colored buttons as shown in the picture below:

Once the sunlight is activated please light up all crystals in the room:

In order to activate the moonlight in the Mama Quilla's secret room, please place the colored buttons as shown in the picture below:

Once the moonlight is activated please light up all crystals in the room:

Then Diggy can enter the Viracocha's Vault.

In order to get to the calendar piece Diggy needs to cross many obstacles:

Then, please pull the levers and light up the first yellow receiver:

Pull the lever and place the following stone on the proper place:

Light up the second yellow receiver:

Pull the lever and place the following stone on the proper place:

Then, the fire will show you how to continue on your path.

Please tap on the statues in the following order:



Finally! There is the calendar piece! But getting it won't be easy. Gods' divine powers won't help us here, this requires something far more powerful ... intelligence!
First of all, please pull the following levers in order to unlock the bridge:

Please note that if object is on a colored background, multiple the value of the object by the value of the colored background to get the correct result.
*HINT