Arcadia

Arcadia is a secret flying town, that can only be accessed, by doing a quest chain that starts in the Village of Ash Mist. Doing these quests will grant you extra much exp, compared to different quests. The first quest starts at level 65, close to Port of the Winds Windia Farm entrance.

the other quests, that you would have to follow, will require different levels, like 66, and 67.

Once all these quests are done in Village of Ash Mist, you will be teleported directly to Arcadia, from there, you would have to do some teleporting from city to city, to discover some new machines, once that's all done you will unlock warp towers in the city, allowing you to teleport directly to Arcadia City.

There are more follow up quests after this, as Arcadia part 2 just released, so keep in touch and do all the selected hero quests there, to unlock the most out of Arcadia city