A mountain town where the streets end, literally, at the foot of the wall. El Chaltén is Argentina's trekking capital: from the last house you set off on foot toward Fitz Roy and Cerro Torre, two granite spires so iconic they inspired the Patagonia logo. At dawn, when the sun sets the rock alight in red, you understand why people cross the planet to be here. No phone, no rush — just you and the mountain.