At $9,000 a day, Necker Island in the British Virgins must be one of the world's most expensive resorts.

For up to 20 people, the tariff covers meals, drinks, accommodations and sports, including use of a full-size snooker table from England. The more thrifty minded can have the island in the off season for a mere $7,500 a day. Or for those willing to limit their group to 10, the off-season price is $5,500 a day.