Puerto Natales sits on Última Esperanza Sound, backed by bare hills and the long weather of Chilean Patagonia. Most travellers know it as the staging point for Torres del Paine, but it is more than a bus stop with gear shops. The waterfront, fishing boats, corrugated houses, and sudden views across the sound give it a frontier mood that is quieter and more human-scaled than Punta Arenas.
The essential nearby sight is Cueva del Milodón, a huge cave where remains of an extinct giant ground sloth were found. In town, the historic pier and boatyard are simple but memorable: weathered wood, old hulls, black-necked swans, and mountains across the water when the sky opens.
Use Puerto Natales slowly if you can. Stock up for treks, eat lamb or seafood, walk the costanera in the evening, and accept that the weather will change its mind several times a day. The town makes most sense when you treat it as part of Patagonia, not just the place before Patagonia.