The Doorway Face

Hint 1 of 12:

There are large foot prints going into the face's jaw.

Hint 2 of 12:

It must be a door, but how to open it is a puzzle.

Hint 3 of 12:

You can study the lock, an empty spot is there.

Hint 4 of 12:

You need to make a turquise puzzle.

Hint 5 of 12:

One piece comes from a double trade.

Hint 6 of 12:

The first half of the trade is with the Kangaroo Rat.

Hint 7 of 12:

The other trader rests beneath the pool.

Hint 8 of 12:

Beneath the pool, you will find an offering plate.

Hint 9 of 12:

The offering statue is feeling a little blue.