Throughout human history, influential groups have used their power to hide secrets from the rest of us.

From treasures hidden away in ancient tombs to documents kept under lock and key and bomb-proof vaults,

let's blast open some intriguing mysteries that have been locked away.

They're listening.

You're listening. You're listening. You're listening. You're listening. I'd be amazed.

According to the Christian Bible, when Moses returned from Mount Sinai, with the Ten Commandments,

he placed them in a huge golden chest.

But whether you're a Christian or just an Indiana Jones fan, you might know this chest by its famous name, the Ark of the Covenant.

Legend has it, the Ark spent centuries bouncing around the Middle East until it was lost in the siege of Jerusalem in 586 BCE.

For many, this is where the Trail goes cold, though some believe the ark headed south to Africa.

For over a thousand years, religious groups and archaeologists have searched the globe for the missing relic.

The clerics of the Church of Our Lady Mary of Zion and Ethiopia, however, believe the hunt is already over and claim to have the ark locked in their treasury.

The only person allowed to access the ark is a single monk assigned the role of the guardian.

This lineage of custodians dates back to the ark's supposed arrival 3,000 years ago. Could these men be a part of a

brotherhood that has protected one of the world's most significant relics for millennia?

Occasional detractors have claimed the church's ark is empty, but nobody officially knows for certain.

If Indiana Jones is anything to go by, maybe we shouldn't open it to

find out. Next up, with immense resources and ties to powerful families, elite universities are a

hotbed for skullduggery amongst the upper echelons of society. But in the case of Yale's most

infamous secret society, this couldn't be more literal.

The Skull and Bone Society is an extremely exclusive group dating back to the 1830s.

They've had three former presidents amongst their alumni alongside countless celebrities and politicians.

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