To the native Mapuche of Argentina’s Andes, the name Huechulafquen means “long lake.” It’s an apt title for this azure spectacle that stretches for 18 miles, and is officially the largest of the 24 lakes in Lanin National Park. Next to the lake, on the northern shore, the conical, snowcapped Lanin volcano rises 12,293 feet into the blue Andean sky. In spring, summer, and early fall, thousands of visitors flock to the lake for camping, hiking, and staging attempts on the dormant volcano’s summit. There are boats for hire at Puerto Canoa and scenic lakeshore cruises, and the fly-fishing in the neighboring Chimehuin River is among the best in the world. A mile and half past Puerto Canoa, visitors will find scenic Piedra Mala and a protected corner of the lake. Walking trails lead towards Lake Paimun and El Salitillo waterfall, and the epic, Andean, mountains vistas are a highlight of both Lanin National Park and San Martin de los Andes.