Ronde Island, Grenada – $100 Million
Its price tag is high, but so is its value. Ronde Island is one of the biggest private islands available for purchase, standing at a staggering 630 acres and nestled in the extraordinary location of the Grenada, it has a lot to offer. Due to it being entirely isolated from civilisation and the effects of fishing, it makes for an extremely peaceful, untouched environment. Snorkeling in the surrounding waters is strongly recommended for this island.