The search after the third crystal starts in the City of Chichen Itza with a few shaped boulders. You proceed through a temple and meet a priest you´ll be able to come back later and claim the treasure part after finding all 13 keys in the city. First, use the ladder and continue to the city.

When you enter the city, follow Hadwin Win to the arena. You need five players to compete. Go find them in the eastern jungle. They´re playing hide and seek, however, they´re not that good 😀 You´ll find them easily (1, 2, 3, 4). Once you find them all, go back to the arena.
Ou shoot! The ball got kicked out of the arena. Go find it to the north-western jungle.
When you find the ball and retrieve it, place it on the table at the side of the arena so the match can continue.
Oh no! The ball got kicked out of the arena again! Help the team and go find it to the north-eastern jungle. There´s a couple of shaped boulders ahead but you´ll surely manage 🙂
When you get the ball, place it on the table so the match can continue.
Now it´s time for Diggy to shine! Stand on the mark and help the team.

A few tiki-taka passes with your dad, shoots and scores! Congratulations!
You´ve won the match and you can continue searching for the crystal in the location Chichen Itza Pyramid 🙂 Good luck!