By Land and By Sea

Booking a room at a hotel doesn't necessarily mean sleeping there. Some coastal hotels are buying or renting private yachts for guests who want to split their stay between land and water. Guests at the Four Seasons Resorts Maldives, where the spa has its own island, can book the hotel's newly renovated catamaran for a three-, four- or seven-night cruise. The 24-strong crew includes a personal chef and a masseur, as well as a videographer for underwater-photography classes (from $1,200 per night on land and $17,000 per day on water;

At the Hotel Belles Rives in Antibes, the concierge can reserve a yacht for sailing the French Riviera. The popular 12-meter Sunseeker can be hired for an overnight trip to St-Tropez, Monaco or Corsica, while a larger 40-meter model can sail for a month and store Jet Skis (from $290 per night on land and $3,680 per day on water;

Guests who book a hotel stay at the Romazzino on Sardinia can party at night and fly-fish during the day aboard one of the four-cabin open yachts (from $810 per night on land and $740 per day on water; costasmeralda). And Portugal's Grande Real Villa Itália Hotel & Spa—the former home of Italy's exiled King Umberto II—can arrange one- to four-day trips in Cascais Bay that feature games like treasure hunts and regattas (rooms from $740 per night, boats from $1,200 per day; hoteis You'll never want to set foot back on dry land.