10. Lady Moura - $210 millionFeaturing the 10th most expensive yacht in the world is the Lady Moura, custom built by Blohm + Voss shipyards in 1990 for Saudi Arabian businessman Nasser Al-Rashid. This luxury liner is mostly recognisable from the outside owing to its name on the yacht exterior in prominent 24-carat gold lettering. The extravagance doesn’t end there. On board the 344-foot Lady Moura is a pool with retractable roof, a helicopter and a 75-foot Viscount Linley dining room table. However, the Lady Moura’s most remarkable feature is, without a doubt, the unique sand-covered hydraulic platform that slides out of one side of the yacht which can be adjusted to sit right at the waterline. Not only does this floating oasis boast real sand and deck chairs, but also palm trees for a truly authentic experience. The Lady Moura also features a Mangusta 80 boat or 48-feet Sant Juan boat, as well as a S76B helicopter. Finally, the yacht is capable of accommodating up to 30 guests and carrying 60 crew members.