With patch 2.3.0, new location is introduced to the game - Ruins of Sescheron. People who played Diablo 2 certainly remember the frozen wasteland from act V. In Diablo 3, we can see how the Barbarians live after destroying Mount Arreat. New location means, above all, new mobs to kill, but also more deadly traps and quests that can earn you a lot of experience. In Ruins of Sescheron, you can also complete quests in adventure mode.
If you successfully go through the harsh climate of the location, you will have to face a crowd of enemies at the very end (in the Elder Sanctum). A very unique reward - Kanai's Cube, which has been guarded by the Barbarians for many years, awaits you.