Esthar was one of those cities that I thought were amazing, so futuristic and beautiful at the same time. I enjoyed running around there but I did get lost rather often.

Although I'm not a huge fan of XII, Rabanastre is an amazing city as well. It's huge and very pretty at the same time. It's fun to walk around there.

I noticed Fisherman's Horizon was mentioned, I loved that place also. It was very peaceful and relaxing, as was the music. It's was quiet but it seemed very nice with all the fishing going on haha.

There are so many cities in this series that are amazing, I can't just pick one. Midgar, Zanarkand, Temple of the Ancients, Nibelheim and many more.