Locals call it the Lake of the Emerald Waters, and the name undersells it — glacial melt off Tronador and the surrounding volcanoes gives Todos los Santos an improbable, almost lit-from-within turquoise, framed by dense temperate rainforest with barely a building in sight. It sits inside Vicente Pérez Rosales National Park and is reached mostly by boat from the Petrohué landing, which keeps pressure low and the shoreline wild. Brown and rainbow trout cruise the drop-offs and river mouths, and a streamer stripped past a sunken log here can produce a fish that makes the whole trip. Wind builds through the afternoon on open water, so mornings tend to fish calmer and safer than the middle of the day.

• Lake
• Volcanic glacial