The Cannes Film Festival attracts not only the world's most famous movie stars, but some of the most expensive yachts on the planet.

The average small yacht (up to 50 feet) is typically priced between $500,000 and $2.5 million. Mid-sized yachts (up to 70 feet) range from $2 million and $6 million, while large yachts (up to 90 feet) ...

These luxury vessels carry price tags so huge they make lifetime earnings look like pocket change, with costs running into ...