There are several nice waterfalls in Parque Natural da Ribeira dos Caldeirões (Cascata na Ribeira dos Caldeirões) near Achada on the Island of Sao Miguel (Azores), Portugal.
From Achadinha drive east to Achada on road EN1-1a. Take the exit to Parque Natural da Ribeira dos Caldeirões and park the car at the parking (gps 37.842055, -25.267161).
There is a botanic garden and 5 mills where water is the main attraction. You don’t have to pay an entrance fee and when walking through the park (take your time) you will see several small waterfalls. At the south side there is also a nice spot to swim at a waterfall.