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; bellesrives.com).

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; starwoodhotels.com/ 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 real.com). You’ll never want to set foot back on dry land.