We call it Lego Falls but the actual name is El Nancito Salto Chayo. When we went, we asked around the town and came across this native Nancito man whom led us to the falls (barefoot) for $10. This is not a known turist destination and that is what makes it so special! It's an easy hike to the falls and well worth it! Make sure that you wear long pants for the hike!
https://www.youtube.com/watch?v=wdD8CTHcVDE
https://www.youtube.com/watch?v=wdD8CTHcVDE