So many of them are great. That's one of the reasons I always loved the Final Fantasies of this era.

Kalm, Cosmo Canyon, Fort Condor, Junon, Icicle Inn, Bone Village

All brilliant. Can't wait to see them remade. Cosmo Canyon is the one that will probably be the most interesting to see in full 3D.

(FF9 still has better locations though :-P)