It starts and finishes at the end of the Lower Circuit, which is located in front of the San Martin Island. The ride is made with powerful motor-boats that pass through the Lower Canyon of the Iguassu River and around the island until the foot of the "Tres Mosqueteros" waterfall, where one can enjoy a spectacular and clear view of both the Brazilian and Argentinean sides, as well as the Devil's Throat Fall.

Besides enjoying the beautiful panoramic view of both sides of the falls, we also get very close to the waterfall of San Martin Island, the biggest waterfall that a motor-boat can approach safely.