Parker Schnabel travels the gold-filled Madeira River deep into the Brazilian wilderness as he hunts for a fleet of dredges bringing in billions.

Parker Schnabel heads deep into the jungles of Guyana, South America, to chase a 21st-century gold rush. Working with his team, he trades his heavy mining equipment for the most basic tools and learns ingenious local techniques.

Parker prospects in Serra Pelada, the site of Brazil's biggest gold rush that produced five billion dollars worth of gold and is rumored to hold trillions more.

Parker decodes the mystery of where a billion-dollar motherlode went. Some say it was mined out, while others believe it’s still buried underground.