The Enlightened Peak is part of the first major area you'll go through in Flintlock: The Siege of Dawn. Getting there can be tricky if you don't know how, but fear not, because I'll tell you how.
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The Enlightened Peak is where you want to go for the 'A Delayed Reunion' side quest, or if you're on the hunt for Enki Feathers. This area is on the far left of the Three Peaks map, and it's actually pretty unclear how to get there. I myself spent ages doing it wrong before I finally figured it out. (I should mention that I'm already well into the second major area.)
To get there, you'll need to travel to the White Bridge Hamlet (1) (where you'll accept the sidequest if you're on it). From there, head to the area marked on the map below (2).
You can get here by turning right immediately after leaving the coffee shop and following the path until you reach a fork in the road. Here you need to turn left and head towards the crane.