?Fountainhead? is one of the world?s most opulent yachts.

Her owner? The Dallas Mavericks owner Mark Cuban, who is also a star of the television reality series ?Shark Tank?.

The superyacht was anchored off Bar Harbor last week, the 288-foot long vessel was built by Feadship Yachts in the Netherlands sports a steel hull and aluminum superstructure.

The cost to build her was estimated at more than $350 million.
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