There must be something like a boat because in the release version of the game there will be an ocean with islands. The sheet of water will be huge. Look at the new map.
At the actual map the river in the east was already big. As we all supposed on the new map the river splits in diverse arms, surrounding a swamp/jungle. Together (riverarms and swamp/jungle) they build a big delta, which is bursting out in an ocean.
That wouldn’t happen to be a New Tortage, or ruins of Tortage and the Barachan Isles, would they? Might be fun to explore the burned out relics of past adventures.
Hypothetically, the story may go that Valeria’s reconstruction of Tortage failed because the Picts took advantage of the power vacuum left by Strom and his thralls. The Picts literally devoured the last vestiges of civilized humanity.
Swamp / jungle is one of my favorite sword and sorcery / adventure settings. I am so glad this is coming in and I am really excited for it. Hopefully those islands are reachable (not behind the green wall) and hopefully the water is deep.