Although pumas might potentially be seen in many parts of the park, the best areas, not surprisingly, correlate to the areas that support the highest densities of guanacos – their main prey species.

These areas lie mainly on the eastern side of the park and to the north of Lake Sarmiento, and cover both land within the national park boundaries and private ranch land.

During your stay in Torres del Paine, these will be the areas you have to concentrate your puma watching efforts, as well as making excursions to other parts.

Patagonia is synonym of outdoors, excursions are mostly outdoors to watch nature, which demands casual clothing; it is recommended to bring good shoes for trekking, windbreak parka, appropriate clothing for mild climate, hat, sunglasses and gloves.

Patagonia (Spanish pronunciation: [pa.ta.ˈɣo.ni̯a]) is a sparsely populated region located at the southern end of South America, shared by Argentina and Chile. The region comprises the southern section of the Andes mountains as well as the deserts, steppes and grasslands east of this southern portion of the Andes.
https://en.wikipedia.org/wiki/Patagonia

There are daily air connections from Santiago de Chile and Puerto Montt to Punta Arenas, the capital city of the Chilean Patagonia, located at the bank of the Magellan Strait.

You can buy your tickets online at http://www.latam.com or http://www.skyairline.cl/