The easiest way to get to the waterfall is to fly to the city of Jaen from Lima, then it takes about four hours to reach Chachapoyas. From there you can book a tour for 20-30$ or find your way up to Cocachimba town and hike to the waterfalls on your own.

Huacachina Oasis
If you don’t have your own vehicle, the best way to get to Huacachina is by Peru Hop private bus