It's known as Anak Krakatoa, or "child of Krakatoa, " and one day it too is likely to blow its top.

FORBES: Don't Go Near The Volcano

Dr Anak Pattanavibool, director of the Wildlife Conservation Society in Thailand, says that if the intensity of patrolling slackens even briefly, large numbers of tigers could be poisoned very rapidly.

BBC: Deadly poison threat to tigers

Because of their quality and rarity, the early modernists' works are appreciating steadily: In 1996, for instance, a painting by Anak Agung Gede Sobrat fetched 11 times the estimate at Christie's auction in Amsterdam.

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