On our last day of the Patagonia tour, we stop for an early and very chilly boat ride across the huge Lago General Carrera to see the Marble Caves – recently noted as a must see by the NYTimes (I would recommend this trip to only the heartiest of travelers!). It takes at least 3 days of travel from Santiago to get this far south along the mostly unpaved road that extends to the southern reaches of the country. We learn from excellent guide that the soft marble is still forming. It is not hard enough to carve. Water is making the most beautiful patterns in the striations of the rock surfaces. Luckily the water is calm today. Our first attempt, the winds whipped up such white caps, that the local coast guard closed the lake. Puerto Tranquillo on the Caratera Austral #7, a hi-way that bisects Patagonia, Chile from Puerto Montt to Punta Arenas.