Luvinia World Visiting Other Nations Guide by Kyo_Sama
Step 1: Go to core of Aurora
Step 2: Go to the continent portal and select Wild Rock Fortress
Step 3: Open the map and look at the choices of Nations. (Note you can only go to nations that are in the same jurisdiction as you)
Now then im personally from the Sea nation but this is how you can visit other nations, my trip took me to the Wind Nation which seems to be rather empty.
A note to be made, Even though they are in the same Jurisdiction as you some NPC’s will react hostile to you.