I am at a part of the game where i need to collect Huge materia. I have already gotton it from Fort condor,corel. Im wondering where do i go now? (i have been pondering this for some time)

Corel Reactor near Corel

There's also huge materia in Cid's rocket.
The code is circle, square, X, X.

And don't forget about the Huge Materia in the Underwater reactor!

Alright thanks guys im in the Reactor now