It’s not all that easy to get information in English.
Highlights include waterfalls and frequent stops for swimming.
Travel 2 Walk posted the best trip report I’ve seen, so far.
… Chapada Diamantina use to be a region supported by diamond mining, but now it’s 95% supported on tourism. As such, the locals take it on themselves to preserve the natural habitat they do have, but at the same time it is important for them to take advantage of it to make a living. …
Majority of tourism (60%) come from foreigners. …
With tourism being their major source of income, it is understandable why they are very discouraging, and sometime are hostile to, independent trekking trips into the park. …
… a must do in Chapada Diamantina, it is the Vale do Pati. …
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