Golden Lake

The Golden Lake is hidden inside a door using the Promised Pen. It is located on the second layer in Goldy Pond.

According to Lucas, the water in the lake appears to be abnormal, as the person touching it can't get wet by it. In the middle of the lake is a floating island with a cabin on top. In the cabin, there is an old elevator and an old telephone. The elevator can only be accessed by using the Promised Pen.

The golden water seems to also be related to a temple that is important to the seven walls, and Emma's ability to enact a new promise with, although exactly how is currently unclear.