Almost none of the tourists who come, no matter how well meaning and well educated, know what happened here, says Ngurah Termana, the nephew of Agung Alit, the man who spent a darkly absurd afternoon sifting through skulls in search of his father’s body. In contrast to Cambodia, where Western backpackers faithfully (or morbidly) visit the Killing Fields Museum outside Phnom Penh, few people who come to Bali are aware that a huge part of the local population was slaughtered right underneath their beach chairs.