group tours to Sumatra

Lake Toba Situated in the north-central region of the Indonesian island of Sumatra, Lake Toba was formed as the result of a super-eruption some 70-75,000 years ago which, (according to Wiki), is considered to have been the greatest volcanic eruption to have occurred in the last 25 million years! At some 30 kilometres at its widest point and 100 kilometres…