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Which is the world's largest volcanic crater?
- Crater Lake
- Ngorongoro
- Yellowstone Caldera
- Toba
Answer: Toba
Lake Toba in Indonesia is the world's largest volcanic crater (caldera), formed by a super-eruption about 74,000 years ago. The caldera is 100 km long and 30 km wide. The eruption is believed to have caused a global volcanic winter.