Some have missiles; some have swimming pools; some have 90-person staffs—all of these boats are enormous vessels of power, expense, and luxury.
The newest yacht in Russian billionaire Roman Abramovich's fleet is the largest private yacht now in existence. It boasts a missile-detection system, a luxury spa, two helipads, a swimming pool, and a miniature submarine. It reportedly cost more than $400 million. To keep out the prying eyes of the paparazzi, the yacht has an electronic "shield" that can detect light sensors in digital cameras and make them unable to take photos.