Thunder Plains
Also known as the Gandof Thunder Plains. The Thunder Plains are a location in Spira that plays a significant role in the story and several side quests. There is a permanent thunderstorm over the area, and lightning may strike you while you’re traveling through the area.
The team will enter the Thunder Plains after reaching Guadosalam and before reaching the Macalania Woods. Refer to the walkthrough section for additional details:
16) Thunder Plains
Walkthrough Guide
Traveling through the south and north portions of the Thunder Plains, past another Travel Agency, on the way to Macalania.
There are also a few side quests that you can complete in this area:
Lightning Dodger
Side Quests
Tips and tactics for dodging lightning strikes in the Thunder Plains to obtain the Venus Sigil for Lulu’s Celestial Weapon, Onion Knight.
You can also pick up the 
Spirit Lance in this area. Check out the Celestial Weapons section for additional information.