Complex sentence: One of the highlights of the park is the Todos los Santos Lake surrounded by stunning snow-capped volcanoes, among which are the Tronador, the Osorno and the Puntiagudo.
Split into simpler sentences: One of the highlights of the park is the Todos los Santos Lake, which is surrounded by stunning snow-capped volcanoes. Among which are the Tronador, the Osorno and the Puntiagudo.