Lake Doric and the Watchtower Coast
Nice catch, I remember trying to get to those towers back in GW1 to get a better look. Are there any people that are tied to that architectural style? That would at least be a clue as to if it was humans or even older that built them, and that might help guess the purpose of the towers. I can’t recall if it is similar to those buildings in lions arch or not.
It’s actually north of Watchtower Coast but the ruined structure the centaurs are in are definitely one of those giant structures from GW1.
Given the direction centaurs are coming from, and the Centaur War having begun in ~300 AE with the Elonian expansion of Kryta (pre-Elonian Kryta seemed to have situated mainly in the coastline around the now-Sea of Sorrows), they were likely meant to watch for centaurs.
As to the watchtower’s architectural style – they’re definitely of Krytan origin, as explained in the Art of Guild Wars book. They even have White Mantle flags all over them and utilize art designs of Krytan buildings.
Stop treating GW2 as a single story. Each Season and expansion should be their own story.