Luxury Yachts: These superyachts for hire are the ones docked in the special slips at marinas. Included in this look at three luxury charter options is a special ecological charter that includes up to 48 guests. This elite cruise on a 200-foot-plus superyacht is included in the Big 3 to offer an idea on how much space is available on ships this large.

1. Princess Mariana: 258-feet
The 258-foot superyacht's most impressive feature is an area dubbed the Beach Club. There is a starboard side dry dock that when the tender is removed it morphs into a 39-foot pool with underwater lighting. And it gets even better. The tender's hull lowers to just above sea level and transforms into a sundeck with steps leading down to the pool.

There also is a heli-pad, a 13-seat cinema, a driving range, a fully equipped gym, and a party deck. The enormous deck has two bars, a raised dance floor, three cinema-size screens, a hot tub, and a grand piano. Including the owner's palatial quarters, there are six staterooms that accommodate 12 overnight guests.

The Princess Mariana is available on a weekly basis at 650,000 euros, which is around $900,000.

2. Feadship Utopia: 233 feet
Utopia cruises the cool blue waters of the Mediterranean around the islands: Cyprus, Crete, Euboea, Rhodes, Lesbos, Chios, Kefalonia, Corfu, Naxos and Andros. The 71-meter motor yacht is the second largest Feadship, accommodating up to 12 guests with six cabins. Whether it is by land or sea, the trappings are extraordinary and, for life at sea, very functional.

Utopia is available for charters in the Caribbean and the Mediterranean islands. A weekly charter starts at around $630,000 weekly.

3. Eclipse: 210 feet
The smallest of the Big 3 is large enough to accommodate up to 48 guests plus a crew of 35 members. The exclusive eco-tours island hops through 18 islands that make up the Galapagos Islands.

The tours of the islands puts visitors up close and personal with sea lions, penguins, and a plethora of indigenous wildlife by land and sea. It is extraordinary journey of enlightenment and entertainment filled with breathtaking beaches and bays with plenty of diving and snorkeling areas.