On the Trail of de Vaca

 is a gameplay achievement and a trophy in Red Dead Redemption.

Description
Uncover every location on the map in Single Player.

Tips and Tricks

 * Visit General Stores in every region to find all maps. Also, the fold out map that came with the game shows every location in the game. There is a map that needed to buy from the gun store in Escalera, this map is not sold at the general store.
 * After having bought/used all of the maps from the general stores, and the player still has only 44/45 for New Austin, there is one location that does not show up on the in game maps. Open up the map and look to the west of Rio Bravo and one will see a cluster of rocks, this location is called "Repentance Rock", and will not appear by just using the in-game maps.
 * Sometimes you will be stuck at 44/45 in New Austin. If this happens just head south from Thieves' Landing, follow the coast until you reach a location called "Old Bacchus Place". On the fold out map, this location is shown to be on the Nuevo Paraiso side of the San Luis River, it is actually on the New Austin side.
 * Yet another location is left off the in-game maps is Plata Grande, an abandoned mine in Perdido, Nuevo Paraiso.
 * Use the Social Club RDR 100% checklist. There is a map with all of the locations that have been visited and those that haven't in order to get this. However, this map has proven to not be entirely accurate. For instance, the game stats say that there are 17 locations in West Elizabeth, but when counting the actual points on the Social Club map, there are only 15. Rockstar Games has yet to address this discrepancy.
 * A map can be bought in the General Store of Manzanita Post.

Trivia

 * The Trail of de Vaca refers the Spanish explorer who, in the early 16th century, charted much of what would eventually become the Southern United States and Northern Mexico, the gameplay region of Red Dead Redemption.
 * The literal translation of "de vaca" means "of cow" and the explorer's full name was "Cabeza de Vaca" which means "head of a cow"