See the little green dot to the left of the waterfall above? That’s a kayak being lowered past the 197-foot (60-meter) Salto Barão do Rio Branco in southern Brazil, which Ben Stookesberry, Chris Korbulic and Pedro Oliva, recently rappelled around on their exploratory Brazil to Patagonia, #Kaiak2015 whitewater mission. Click on the Soundcloud box below to hear Stookesberry explain why this is the “perfect waterfall,” the potential future site of a kayak world record. For now, it’s only speculation when or where somebody will overtake Tyler Bradt’s 2009 run of the 189-foot Palouse Falls in Washington.

–Click here for a rundown of the biggest waterfalls ever run in a kayak.
–Follow the #Kaiak2015 expedition in real-time.

Super short: Video of the Brazil to Patagonia expedition’s rappel.