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.

Humantay Lake
From Cusco, you can hire a taxi or a rental car and go on your own to the national park