Cambodia’s 5 Mysteries That Still Have No Answer

At the top of a seven-tiered pyramid, a hundred and twenty kilometres into the Cambodian forest, there is a shaft that drops straight down into the dark. Guards are posted there because visitors keep trying to climb in. Nobody has ever worked out what it was for.

Two hundred and sixteen stone faces, each one taller than a man, carved with no name, no symbol and no marking of any kind — so that after a hundred and fifty years, nobody can say who they are.

Six enormous spirals cut into the earth beside the largest religious monument on the planet. A team walked every metre of them looking for a single object. What they found was worse than nothing.

A capital city on a sacred mountain that people searched for on foot for a century and could not reach — because of what was buried in the ground around it.
And an empire that ruled half of Southeast Asia, and then stopped.
Five discoveries in one country. Nobody has an answer.