Stats: 126.2 metres, Lürssen, 2003, 12 guests, 45 crew
Bang for your buck: Octopus is available to charter for the first time since her delivery to the late Microsoft co-founder Paul Allen in 2003. At 126 metres, Octopus is one of the largest superyachts in the world, so has plenty of space on board for amenities. She’s also well equipped for exploration, with two helipads and a hangar, storage for up to seven tenders, an ROV, Triton submarines and a fully-equipped dive centre. Across her eight decks, Octopus also boasts a glass-bottomed underwater observation lounge, a cinema, a heated freshwater swimming pool and multiple Jacuzzis, bars and al fresco entertaining areas.