Atlantis II — $100 million
Owned by the family of the shipping magnate Stavros Niarchos, this 380-foot yacht is in Monaco, according to Forbes. SuperYachtFan values it at $100 million.
Romea — $120 million
The 268-foot Romea, owned by the metal billionaire and investor Alexander Nesis, can be found in La Ciotat. Its estimated value is $120 million.
Musashi — $130 million
Also in La Ciotat is Musashi, the Oracle founder Larry Ellison's 287-foot yacht, which is estimated to be worth $130 million.
Lionheart — $150 million
The British billionaire Philip Green is the owner of Lionheart, a 295-foot yacht worth an estimated $150 million that can be found in Monaco.
Maltese Falcon — $150 million
Another superyacht with an estimated $150 million price tag is the Maltese Falcon, a 289-foot vessel owned by the hedge fund success story Elena Ambrosiadou. Forbes spotted it in Cannes.
Sunrays — $150 million
The steel and oil magnate Ravi Ruia appears to be headed for Antibes — or at least his yacht is, Forbes said. The 280-foot vessel is worth an estimated $150 million.
Madame Gu — $150 million
Also in Antibes is Madame Gu, which belongs to the steel billionaire Andrei Skoch. Clocking in at an impressive 325 feet, the yacht has an estimated cost of up to $150 million.
Lady Lara — $160 million
Breaking the $150 million mark is Lady Lara, owned by the metal and energy billionaire Alexander Machkevitch. The 299-foot yacht, worth an estimated $160 million, was spotted on its way to Antibes.
Tatoosh — $160 million
Also valued at an estimated $160 million is Tatoosh, a 303-foot yacht owned by the estate of the Microsoft cofounder Paul Allen. It was recently spotted in Marseilles.
Sailing Yacht A — $480 million
The 469-foot Sailing Yacht A is hard to miss, as anyone who spotted it on its way to Antibes has surely discovered.
One of the largest private sailing yachts in the world, it's owned by a Russian billionaire named Andrey Melnichenko and has been estimated to be worth a whopping $480 million.
Its masts are taller than Big Ben, and among its features are eight decks, a free-floating spiral staircase, a huge swimming pool, and an underwater observation pod.
Serene — $500 million
Saudi Crown Prince Mohammed bin Salman is the owner of the 439-foot Serene vessel, which Forbes spotted heading to Monaco.
Prince Mohammed reportedly dropped $500 million on the superyacht in late 2016 after seeing it while vacationing in the south of France.
It has two helipads, an indoor climbing wall, a fully equipped spa, and three swimming pools.
Eclipse — $590 million
Roman Abramovich, a steel and investment billionaire who owns Chelsea FC, is the owner of the 533-foot superyacht Eclipse, perhaps one of the most recognizable in the world.