| SUMATRA is the largest of the islands that lie entirely within Indonesia. Kalimantan and Papua have larger areas, but they share islands with other countries. I went to Sumatra twice: once in 1986, and again in 1988. |
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A large lake in the caldera of a volcano that exploded about 75,00 years ago 
 
A large island, about 200 sq. mi., in the middle of Lake Toba, seat of the Batak culture. 
 
 
A city near two volcanos, one of which, Mt. Merapi, was still active. 
 
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