Among the theories about the mystery door shared with Mandy on social media were "a coffin drop, safe stash, priest hole, coal store, laundry drop, [and a] maid's entrance from kitchen to bedroom." ...

They're dug into the ground, have retractable ceilings or trap doors, spiral staircases, and can hold up to 1,900 bottles of wine. Story by Jacob Shamsian and editing by Chelsea Pineda More from ...