The company behind the boat ride everyone comes back soaked from. Iguazú Jungle has operated inside the national park since 1994 and is the only outfit licensed to take boats up the rapids below the falls: the Gran Aventura runs a truck through the forest and then a boat up the gorge into the spray of the San Martín and Tres Mosqueteros falls. The quieter Paseo Ecológico floats the upper river instead, and the Travesía combines both.
The WhatsApp is the number Puerto Iguazú's municipal tourism board lists for them, and it is the one on their own site. Tickets are sold at their desks in the park; the pin marks the landing below the falls.