Chile's oldest and one of its most visited national parks lies an hour's drive east of Puerto Varas. The two main attractions are the Petrohué waterfalls — a series of chutes where the Río Petrohué tears through black volcanic rock — and the emerald-green Lago Todos los Santos, the most photographed lake in southern Chile.
A small ferry crosses Todos los Santos from Petrohué village to Peulla in the eastern part of the park; this is also one half of the famous Cruce Andino lake-crossing route to Bariloche in Argentina. Most visitors take a half-day tour that includes the falls, the lake, and a stop at Volcán Osorno. The full-day tours add a boat ride. CONAF charges about $7 entry to the falls.