Owned by Microsoft co-founder Paul Allen, this massive yacht spends most of its time moored in Antibes, France, and even has a helicopter landing pad. 13. Al Mirqab — 133 metres / 437 feet.

The 115-meter yacht has two helipads and a garage full of toys, including jet skis. 9. Al Said is worth $300 million (tie). Al Said was built for Qaboos bin Said Al Said, the billionaire Sultan of ...