I’ve been there. I traveled through Patagonia in Argentina and Chile. It’s one of the most interesting places I’ve ever traveled to. Torres del Paine is utterly worth the trek. El Calafate – go see the glacier! Peurto Natales – a neat little town. Ushuaia is a must-see. Camp in the forest and have a real experience. It’s windy. The steak was absolutely amazing, far better than any American beef I’ve ever had. I love you American beef but you’ve got nothing on pampas grass feed beef.
Lonely Planet Argentina with a Patagonia section on Amazon: https://amzn.to/2SBO3DY
Moon Guides for Patagonia on Amazon: https://amzn.to/2tdmORQ