Plans unveiled for world's largest yacht

CNN.com: "The floating palace has been designed at a whopping 656 feet (200 meters) in length -- as long as two football fields end-to-end.

If built, it would surpass the world's current largest private yacht, Russian billionaire Roman Abramovich's 'Eclipse,' by 99 feet (30 meters).

With a myriad of over-the-top luxury toys -- including a two-level cinema, a nightclub and helipad -- the yacht unsurprisingly comes with a hefty price tag.

Berkeley March, the yacht's naval architect, told CNN the boat could cost up to $1 billion (�650 million) to build, 'depending on the needs of the clients.'"