From My wiki

Server	N/A
Title	Aerial City
Town	Fort Ouph
Translation	The Fort of Elves
Level Range	50-70

"Fort Ouph means 'The Fort of Elves.' It originated as a fort built in preparation for a war with Carmina Gadelica, but since the peace agreement, it has acted as a watch tower for monsters."

— CC Corp —

[edit] Sigma Server: Aerial City Fort Ouph

Fort Ouph, was located in the Sigma Server, is the fourth Root Town that players could access in The World. The monsters here are far stronger than the ones found in either Lambda Server or Theta Server.

[edit] Root Town

This is no longer the Sigma Root Town, please see New Lia Fail for more information.