Create an epic drone photograph capturing a majestic waterfall flowing through a lush, ancient forest canopy, illuminated by the soft glow of a setting sun casting a rainbow across the misty waters.

A spectacular aerial landscape photograph viewed from a drone's perspective. The image features an impressive waterfall energetically cascading through a green, dense and ancient forest canopy, teeming with biodiversity. The entire scenery is softly bathed in warm light from a slowly descending sun, lending an ethereal quality to the surrounding mist shimmering with a full spectrum rainbow created by the interaction of sunlight and the water vapour.