evidence: Cerro Fitz Roy in contrast to Cerro Torre sits at 3,405m and was first climbed in 1952. It was discovered by Argentine Explorer Francisco Moreno (of Perito Moreno fame) and named after Robert FitzRoy who captained the HMS Beagle, the same ship Charles Darwin sailed on his evolutionary escapades, much of which was along the Patagonian coast. It is still regarded as one of the most technically difficult mountains in the world to climb. [...] Large groups were coming down the mountain so it was difficult to progress freely. Fitz Roy is the most popular hike in El Chaltén. Most looked relieved to be descending, many were still wrapped up warmly from the lookout. The trail was a mix of boulders and roughly made stairs using the available rocks. Our hike thus far had revealed Argentina spend more effort on trail markings and maintenance than their Chilean neighbours, we even passed a work crew fixing up one particularly slippery gravel section by cutting in some stairs.