He added two guardhouses, a grotto, and a massive 30-foot-by-60-foot salt water swimming pool that touted fish and three accompanying diving boards.

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Like Tahiti, its drilling involved piercing an 11, 000-foot layer of sedimentary salt.

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Salt Key, which is next to it, only rises about eight-foot except for one hill that isn't big enough to have a house on it.

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