Barrancoso River, Argentina
The Barrancoso river is, literally, at the end of the world. Anglers must travel to Buenos Aires, take a regional jet to El Calafate (it’s almost a three-and-a-half-hour flight), and finally board a four-hour shuttle to reach the estancia on which the river’s located.
The reward for anyone who’s up for an adventure to the end of the world is some phenomenal fishing. The Barrancoso River is one of the best small pieces of water in the world for high densities of giant fish.