Right behind the Dire's fountain, there's a little "empty" spot which can be reached, and seems not made on purpose.

1) Get any Hero able to teleport/dash/travel to a yet unexplored area such as Faceless Void or Storm Spirit.
2) Level up that skill.
3) Get to The Dire's fountain.
4) Move your camera to the very top-right of the map.
5) Target the skill to the top-right corner of your screen.

Result: You are able to reach a "hidden" spot upside-/-behind the Dire's fountain.

Expected: Totally unexpected!