From Science Channel.

An abandoned system of caves was once the meeting place of a secret society that worshiped Satan and performed black magic, and new discoveries at this mysterious site reveal what really happened here and why a Founding Father was a frequent guest.

#ScienceChannel #MysteriesOfTheAbandoned

About Mysteries of the Abandoned:
The world’s most incredible engineering projects are revisited to uncover why places full of mysteries and untold secrets are now abandoned ruins.

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