Aztec Gold

Aztec Gold is a Stranger mission in Red Dead Redemption.

Story
A man in Sidewinder Gulch, west of Tesoro Azul, wants Marston's help to find his family's lost Aztec treasure.

Walkthrough
This stranger mission requires you to find pieces to Basilio's map so he may find his ancestor's treasure. Without the map, there will be no treasure if you go there.
 * The first piece is on a cliffside in Sidewinder Gulch just after meeting with him. Look for an unusual stone pile much like the ones you need to find for the Treasure Hunter challenges.
 * The second piece of the map is located inside a broken down house in Primera Quebrada (south east area of Mexico).
 * The third piece can be found at Alta Cabeza (just south west of El Matadero) near the north east side of the hill.

After you have collected these pieces, head over to El Matadero and talk with Basilio. After you give him his map he will rush off into the caves east of town and you have to meet up with him there. At this point the man will find no treasure and is left dismayed and defeated.

Trivia

 * At the second map location near Primera Quebrada, there is a graffiti on a stone wall. The graffiti reads "I DON'T UNDERSTAND INFINITY", which is a cheat code to grant an infinite Dead-Eye meter.
 * If starting the quest as John then finishing it with Jack, he humorously comments saying that "John" looked younger, this may only happen when wearing John's old clothes.