I got this from this site - http://www.ffextreme.com/ff10/secrets-map.php
Final Fantasy X-Secrets-Map Locations
There are several hidden locations on the world map that you can find by selecting specific coordinates while aboard the airship. Just move the cursor to the approximate coordinates and press X to search that region. Finding the precise spot for each location can be tricky, so if neccessary, keep moving the cursor while pressing the X repeatedly.
Hidden Locations
X Coordinate Y Coordinate Location Name
11~16 57~63 Baaj Temple
12~16 41~45 Sanubia Desert
29~32 73~76 Besaid Falls
33~36 55~60 Mi'ihen Ruins
39~43 56~60 Battle Site
69~75 33~38 Omega Ruins
Baaj Temple
Here you can obtain Lulu's legendary weapon and the powerful aeon Anima. More complete details on acquiring Anima are in our Hidden Aeons section.
Sanubia Temple
There is a lone treasure chest in this isolated area that contains Tidus's Ascalon, which bears the double AP ability.
Besaid Falls
This tiny rock out cropping under the waterfalls in Besaid is where you can find Kimahri's Dragoon Lance.
Mi'ihen Ruins
In this area of the ruins off the coast, you can find the Sonar for Rikku, which comes with two abilities.
Battle Site
Proceed north from the save sphere to find Lulu's Phantom Bangle, which absorbs three types of elemental attacks.
Omega Ruins
The secret location that is the home of a legendary fiend. Click here for more details on Omega Ruins.
I got this from this site http://www.ffextreme.com/ff10/secrets-airship.php
Final Fantasy X-Secrets-Airship Passwords
There are also hidden locations accessible by using the Input feature found in the airship command list. You can find these passwords by deciphering Al Bhed messages left in specific locations around Spira. All passwords are case sensitive.
Password Number 1: GODHAND
Input the password GODHAND in all caps to reach the ravine below Mushroom Rock Road. Rikku's legendary weapon is in a treasure chest at the top of the area.
Password Number 2: VICTORIOUS
This password opens a secret location at the ruins in Besaid. Climb up the tree branch to find Rikku's Victorious, armor that nullifies three types of elemental attacks.
Password Number 3: MURASAME
This password opens another secret location at the ruins in Besaid. Cross the platform to find Auron's Murasame, which bears the One MP Cost ability.
i got this from this site - http://www.ffextreme.com/ff10/secrets-airship.php
Final Fantasy X-Secrets-The Cloudy/Celestial Mirror
To acquire the Cloudy Mirror, you must goto Remiem Temple in the Calm Lands. Talk to the chocobo on the right hand side to race on the spiraling track under the temple. If you win the race, you will receive the Cloudy Mirror. To acquire the Celestial Mirror you must take the Cloudy Mirror to Macalania Woods and do the following:
Talk to the mother and son standing near the Save Sphere in Macalania Woods-South. The mother will mention that her husband is supposed to meet her.
Then go to Macalania Woods-Campsite and talk to the man to the right, who is her husband. Tell him where his wife and son are and return to Macalania Woods--South.
Head up the mysterious, glowing path near the Save Sphere. At the intersection, head north until you see the boy standing in front of a large spherical crystal.
Talk to the boy and use the Cloudy Mirror on the crystal. The Cloudy Mirror will change into the Celestial Mirror. This mirror is the key to obtaining the party's legendary weapons.
Hidden Aeons
Yojimbo
Believe it or not, there are aeons even more powerful than Bahamut. In the Calm Lands, circle past the right side of the bridge leading to Mt. Gagazet, and descend into the gorge below. To the left of the Save Sphere is the Cavern of the Stolen Fayth. Proceed through the cave until you encounter the spirit of a dead summoner. The summoner will call Yojimbo. This aeon has high physical defense but low magic defense, so hit him as often as possible with spells such as Firaga. Afterward, you can use the teleport pad there to travel to hidden chambers containing a Flexible Arm, an MP Sphere, and two X-Potions.
Next, travel to the Chamber of the Fayth and speak to Yojimbo to negotiate a fee for his services. He will offer his lowest initial asking price if you choose the options "To defeat the most powerful of enemies." For your first bid, offer half of his asking price plus 1 Gil. So if he asks for 250,000, offer 125,001 Gil. After his next offer, raise your bid by 1 Gil. By the time he proposes 205,000 Gil, he will generally accept offers below 200,000 Gil, though not much lower. If at any point you offer him at least triple his askin price, he will give you two teleport spheres in addition to his services. More information is available in the aeons section.
Anima
Acquiring Anima is sort of a sidequest involving several steps. Find the hidden location Baaj Temple with the airship. Run up the familiar path and dive into the water. Then prepare to finally defeat Geosgaeno, and swim toward to underwater temple entrance.
Geosgaeno: Geosgaeno attacks with Stone Punch and KO Punch, so equip Rikku, Tidus, and Wakka with armor bearing protection against petrification and death. Cast Hastega and Protect on the party, and use everyone's Overdrives.
After defeating him, swim north into the temple entrance. Enter the Chamber of the Fayth, where you'll find four Mega Phoenix items and a Megalixir. Approach the six statues on either side. There is one hidden item in each of Spira's six Cloisters of Trials. You should have five of these items at this point, and five of the statues in this room will activate as a result. Now you just need to get the last item from Zanarkand Dome.
Fly back to Zanarkand and enter the dome. There, a new puzzle solution is displayed on-screen. Step on three white squares in the first room and the four in the larger chamber. This opens a panel in the first room revealing a Destruction Sphere. Place the Destruction Sphere into the slot to the right of the monitor in the larger chamber, and the screen will explode. Collect the Magistral Rod, and return to the Baaj Temple. This six statues will now resonate with the items you have collected, allowing you to enter the Chamber of the Fayth. Now this powerful aeon is yours!.
The Magus Sisters
To get the Magus Sisters, capture all of the required types of fiends on Mt. Gagazet and return to the monster arena owner in the Calm Lands. As a reward, he gives you the Blossom Crown. You must also possess all of the other aeons, including Yojimbo and Anima. Next, go to Remiem Temple in the Calm Lands.
After you defeat Spathi, Belgemine will give you the Flower Scepter. After defeating all of the aeons at Remiem Temple, use the Blossom Crown and Flower Scepter on the door in the back to unseal it and acquire the Magus Sisters. Now all you have to do is defeat the Magus Sisters at Remiem Temple to get another item...
Final Fantasy X-Secrets-Omega Ruins
Find the Omega Ruins using the airship's search options, as described at the beginning of this section. This is a secret dungeon where powerful enemies dwell. The goal is to defeat and release the soul of the heretic Omega. However, another reason to search this area is that you can gain several sphere levels very quickly. The monsters here also drop lots of Lv 3 and 4 key spheres.
Areas in the Omega Ruins only appear on the map as you explore them, so use maps we've provided here. From the entrance, move into the corridors to the left or the right.
In the west corridor, follow the path up to a dormant glyph on the wall. Proceed north from there to a chamber with four treasure chests. The Al Bhed Primer vol. XXVI is on the floor just north of the chests. Head northwest from this room into a side corridor with another glyph. Activate this glyph and return to the dormant one. The glyph works now and it raises a bridge out to a treasure chest suspended above the central space. Collect the Teleport Sphere from the precipice.
At the north end of the ruins is a teleport pad. In the chamber above, the party encouners a monster called Ultima Weapon. This creature is merely a shadow of Omega Weapon, so step on the telport pad to proceed.
Ultima Weapon: Before the battle, equip armor that protects against status ailments like confusion, petrification, and silence. Try to inflict silence and darkness to hinder his magic and regular attacks. Steal from him to gain 10 Doors to Tommorow, and if you can spare 1,400,000 Gil, bribe him to receive 99 Pendelums.
In the huge cavern that follows, a mini-boss battle awaits the party on each of the connected platforms. First, head left from the entrance for a Friend Sphere, and then go back to the right to make your way down. Restore your party's HP and MP before reaching the final platform.
Omega Weapon: Since Omega is practically immune to every status ailment, focus instead on strengthening your own defenses. Use abilities like Shell, Haste, Focus, and other abilities to survive his mostly magical arsenal. Make sure you steal from him for 30 Gambler's Spirits. Have Kimarhi use Lancet to learn the most powerful Ronso Rage, Nova. The treasure chest behind Omega Weapon contains a Magic Sphere.
Final Fantasy X- Al Bhed Volumes
There are 26 Al Bhed language primers scattered throughout Spira. Each volume covers a specific letter of the alphabet and can be used to decipher the Al Bhed language. The locations of all 26 volumes are listed below.
Volume Explanation Location
Al Bhed
Primer Vol. 1
Language Dictionary containing [a] [i] [u] Al Bhed Salvage Ship
Al Bhed
Primer Vol. 2 Language Dictionary containing [e] [o] Besaid Village-Crusaders Lodge
Al Bhed
Primer Vol. 3 Language Dictionary containing [ka] [ki] S.S. Liki-Engine Room
Al Bhed
Primer Vol. 4 Language Dictionary containing [ku] [ke] [ko] Kilika-Tavern
Al Bhed
Primer Vol. 5 Language Dictionary containing [sa] [shi] S.S. Winno-Bridge
Al Bhed
Primer Vol. 6 Language Dictionary containing [su] [se] [so] Luca Stadium-Basement B
Al Bhed
Primer Vol. 7 Language Dictionary containing [ta] [chi] [tsu] Luca Theater-Reception
Al Bhed
Primer Vol. 8 Language Dictionary containing [te] [to] Mi`ihen Hightroad (Automatically acquired from Rin
Al Bhed
Primer Vol. 9 Language Dictionary containing [na] [ni] Mi`ihen Highroad-Newroad, North
Al Bhed
Primer Vol. 10 Language Dictionary containing [nu] [ne] [no] Mushroom Rock Road-Precipice
Al Bhed
Primer Vol. 11 Language Dictionary containing [ha] [hi] [fu] Djose Highroad
Al Bhed
Primer Vol. 12 Language Dictionary containing [he] [ho] Moonflow-North Wharf
Al Bhed
Primer Vol. 13 Language Dictionary containing [ma] [mi] Guadosalam-House
Al Bhed
Primer Vol. 14 Language Dictionary containing [mu] [me] [mo] Thunder Plains-Agency(Acquired from Rin if you tell him your study of Al Bhed is goin okay. Otherwise, it appears later in the Sanubia Desert-East.)
Al Bhed
Primer Vol. 15 Language Dictionary containing [ya] [yu] [yo] Macalania Woods-Lake Road
Al Bhed
Primer Vol. 16 Language Dictionary containing [ra] [ri] Lake Macalania-Agency Front
Al Bhed
Primer Vol. 17 Language Dictionary containing [ru] [re] [ro] Sanubia Desert-Central
Al Bhed
Primer Vol. 18 Language Dictionary containing [wa] [wo] Sanubia Desert-Central
Al Bhed
Primer Vol. 19 Language Dictionary containing [n] Al Bhed Home
Al Bhed
Primer Vol. 20 Language Dictionary containing [ga] [gi] [gu] [ge] [go] Al Bhed Home-Living Quarters
Al Bhed
Primer Vol. 21 Language Dictionary containing [za] [ji] [zu] [ze] [zo] Al Bhen Home-Main Corridor
Al Bhed
Primer Vol. 22 N/A Bevelle Temple-Priests' Passage (This can only be acquired immediately after the wedding scene.)
Al Bhed
Primer Vol. 23 N/A THe Calm Lands-Central (northwest section)
Al Bhed
Primer Vol. 24 N/A Remiem Temple (On the left side, near the chocobo.)
Al Bhed
Primer Vol. 25 N/A The Calm Lands-Cavern of the Stolen Fayth
Al Bhed
Primer Vol. 26 N/A Omega Ruins