If you’ve ever driven down to Key West – and you have, we know you have – you have driven past Shell World. But have you ever ventured beyond the shark jaws to step inside? Because if you have, wonder ...

ON SHELL KEY — Suzi Kinter picked her way down the white sandy beach, noting the stagnant, murky water pooled nearby. "The water here used to be crystal clear," she said. "You could see 10 feet down." ...