Along the Hudson River waterfront in Hoboken, New Jersey, sits a mysterious stone archway that marks one of the strangest chapters in American history.
Sybil’s Cave isn’t really a natural cave at all, but rather an excavated grotto built in the 1830s by the wealthy Stevens family to capitalize on a natural spring they believed had healing powers.
Visitors once traveled from miles around to taste the supposedly magical waters and stroll through the romantic Gothic entrance…