Lake Rotomahana is an lake in northern New Zealand , located 20 kilometres to the south-east of Rotorua . It is immediately south-west of the dormant volcano Mount Tarawera , and its geography was substantially altered by a major 1886 eruption of Mount Tarawera . Along with the mountain , it lies within the Okataina caldera
1886 eruption of Mount Tarawera
1886 eruption of Mount Tarawera
Lake Rotomahana