its the place where tidus first ends up in spira..

its not on the map when you get the airship, but its the far northwest i believe, you just have to put in random coordnates until you happen across it.

once you go in the water, you fight the giant fish (cant remember his name right now) before you can do anything else. have armor to protect against death and petrify.. but theres bound to be a better battle strat somewhere else.. yet he's not that difficult.

once in the temple, there are six (if i remember correctly) statues lined around a room. once theyre all activated, the barrior to the chamber of the fayth is broken. if you got all the secret items within each temple throughout the game, itll be easy to waltz right in.

if not, just wait til (SPOILER)you confront mika to go back to the temples to get the items. except bevelle.. oi. i still dont know what the story is behind that one.

and anima is well worth it.