Reeking of decay and packed with bowls of human fingers, a partly burned baby, and gem-studded teeth–among other artifacts–a newfound Maya king’s tomb sounds like an overripe episode of Tales From the Crypt.

But the tightly sealed, 1,600-year-old burial chamber, found under a jungle-covered Guatemalan pyramid, is as rich with archaeological gold as it is with oddities, say researchers who announced the discovery Friday.