Puzzle 20

Puzzle 20 is one of the mysteries in Islands of Insight.
==Hints==
*The converging waterfalls originate from different lands.
*Search for a corner between two areas.
==Solution==
At the confluence of Verdant Glen, Lucent Waters, and Autumn Falls, hidden amidst rocky outcrops by the Autumn Falls river, discover the target. Utilize it as a matchbox with the giant rhombus in the first area.
== Trivia ==
Old description: Above a precipice where twin waterfalls converge mid-air, an intriguing object awaits amidst rocky cliffs. Solve this puzzle, reminiscent of a matchbox, utilizing elements from the surrounding environment.