The Dejarin Estate is an explorable area in Kourna. It previously belonged to the Dejarin family, but was lost to the Kournan military, who force enslaved Centaurs to work the land. The estates are mostly located on a large island in the delta of the Elon, and on the east bank of the river. The Kournan Army also maintains a garrison on the island, to prevent a Centaur uprising and watch the route to Gandara, the Moon Fortress.
The ritualist boss in Dejarin Estate, Podaltur the Angry, deals enormous AoE damage in hard mode. Be prepared to counter his Spirit Rift, which can deal around 550 damage.
The Acolyte of Dwayna in the Kournan fortress can also be extremely difficult. See her page for relevant strategies.
It is possible to get stuck behind the boat all the way in the north a bit west of Kodonur Crossroads, when you walk all the way into the corner where the boats meets the wall.