When I reflect back on my time in South America, my mind always drifts back to meandering through the Peruvian Andes. I was fortunate enough to be a passenger for two nights onboard the Belmond Andean Explorer, the first and only luxury sleeper train in Peru. There are four different one- or two-night routes you can take: Andean Plains + Island of Discovery (two nights), Spirit of the Andes (one night), Spirit of the Water (one night) and my journey, the Peruvian Highlands, which took me from Cuzco to Arequipa, via Puno, over the course of two nights.