Assassin's Creed: Odyssey Fate of Atlantis will take you to an underwater, forgotten city. If you are worried that it will interrupt your journey in Greece, don't - we're here to help. You can continue to complete quests involving Atlantis, or return to Greece at any time, and continue quests that take place there.
Assassin's Creed: Odyssey Fate of Atlantis offers two ways of switching between the worlds.
Portals encountered in the world
Portals have appeared around the map. They are marked with a green circle - you can see it in the screenshot above.
If you approach such a location, you'll see a golden portal. If you enter it, you can choose the world to which you want to be teleported.
From the world map
To avoid searching for the portals, the authors have prepared an easier option. All you have to do is to view the world map and click on a button that activates the portals (in case of PS4, Square)
You can choose your destination once you activate the option.