Why bother visiting the island when you can ride it, right? Wallyisland (perhaps an ode to the Griswalls) is a behemoth of a boat measuring 325 feet and offers a customizable main deck that can be outfitted with tennis courts, swimming pools, trees, helipads, and more. Does 17.5 knots, can hold up to 24 guests and includes two 45 foot Wallypower dingies for shore visits.  Looks like an oil tanker retrofitted with trees if you ask me.

[Uncrate]