Once you gain control of the airship after the events in Zanarkand, you can unlock a number of areas in two ways: manually searching the map for the X/Y positions of the areas, and others via passwords. Here, I will cover most of these areas, though only the minor areas are covered in the scope of this particular section - see the links for the larger areas.

PASSWORDS

Password (CASE-SENSITIVE) Area Unlocked Details:

GODHAND - Mushroom Rock - Go north to find Rikku’s Celestial Weapon, the Godhand.

MURASAME - Besaid Ruins 2 - Open the chest nearby for Auron’s Murasama katana.

VICTORIOUS - Besaid Ruins 1 - Go around the structure to find Rikku’s Victorious armor.

(X,Y) POSITION COORDINATES (approximate)

X Y Area Unlocked Details:

1214 5861 Baaj Temple - See Baaj Temple for more.

4042 5759 Battle Site - Easily grab the Phantom Bangle for Lulu here. It has Fire/Ice/Water Eater.

3032 7376 Besaid Falls - Easily grab the Dragoon Lance for Kimahri here. It has Magic Counter and Evade & Counter.

3436 5658 Mi’ihen Ruins - Easily grab the Sonar here, which has Initiative and Poisonstrike.

7173 3536 Omega Ruins - See The Omega Ruins for more.

1315 4244 Sanubia Sands - Easily grab the Ascalon for Tidus here. It has Double AP!