Despite the neglect, some features remain in excellent condition, including the grand foyer with its sweeping staircase, double-height ceiling, and leaded glass windows. Polished hardwood floors and moulded wall panels have also stood the test of time, while the ornate cherry woodwork is especially striking.

Perhaps the most surprising find is the basement 'crypto cave' discovered by photographer Dave. With thermal insulation, sealed windows, a fan for temperature control, and stacks of storage boxes, it would have made an ideal hideout for a crypto enthusiast.

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Why these stunning modern mansions have been left to rot