How do I get to the area at the Great Caves?

If you do not know what I am talking about , it's that one area above the Great Caves at the map

If you're talking about the snowy area, you will have to finish the great caves first

DanielSpaniel I am on the 4th act of the game

This one

Mynkillian You can try searching for a Youtube tutorial.

That's purplemoor crypt iirc, you'll find it by falling once from the Chamber of Power's portal room