Anonymous
the eposide will be aired on 28th november and below is the summary of the eposide The West Air Temple is situated nearest to Fire Nation territory. It exclusively housed female Airbenders, and is the only temple not yet seen in the series. It is mentioned at the end of The Day of Black Sun, after the invasion failed, that they would go there for safety.
Manga
u can find out from wiki, also can find it out from 8manga... it had it all you need